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Thread: Windows doesn't load: Invalid EFI File Path

  1. #1
    Join Date
    Mar 2013
    Beans
    4

    Windows doesn't load: Invalid EFI File Path

    I installed Linux Mint, and in the process removed Windows 7 (the C:\ drive was corrupted). I had a backup, fortunately, so I reformatted the drive and restored the backup. Linux Mint recognizes the drive and all its files, GParted says it's a-ok, and GRUB recognizes it as an operating system. But when I try to boot to Windows 7, it spits out "Invalid EFI file path". Now, this seemed similar to this thread's situation, so I ran bootinfoscript (post 4), which gave this:
    Code:
                      Boot Info Script 0.61      [1 April 2012]
    
    
    
    ============================= Boot Info Summary: ===============================
    
    
     => No boot loader is installed in the MBR of /dev/sda.
     => Grub2 (v1.97-1.98) is installed in the MBR of /dev/sdb and looks at sector 
        1 of the same hard drive for core.img. core.img is at this location and 
        looks in partition 2 for /boot/burg.
    
    
    sda1: __________________________________________________________________________
    
    
        File system:       vfat
        Boot sector type:  -
        Boot sector info:  No errors found in the Boot Parameter Block.
        Operating System:  
        Boot files:        /efi/linuxmint/grubx64.efi
    
    
    sda2: __________________________________________________________________________
    
    
        File system:       ext4
        Boot sector type:  -
        Boot sector info: 
        Operating System:  Linux Mint 14 Nadia
        Boot files:        /boot/grub/grub.cfg /boot/burg/burg.cfg /etc/fstab 
                           /boot/extlinux/extlinux.conf /boot/burg/core.img
    
    
    sda3: __________________________________________________________________________
    
    
        File system:       swap
        Boot sector type:  -
        Boot sector info: 
    
    
    sdb1: __________________________________________________________________________
    
    
        File system:       ntfs
        Boot sector type:  Windows Vista/7: NTFS
        Boot sector info:  No errors found in the Boot Parameter Block.
        Operating System:  Windows 7
        Boot files:        /bootmgr /Boot/BCD /Windows/System32/winload.exe 
                           /wubildr /wubildr.mbr
    
    
    sdb3: __________________________________________________________________________
    
    
        File system:       ntfs
        Boot sector type:  Windows Vista/7: NTFS
        Boot sector info:  According to the info in the boot sector, sdb3 has 
                           40550399 sectors, but according to the info from 
                           fdisk, it has 40963823 sectors.
        Operating System:  
        Boot files:        /bootmgr /boot/bcd
    
    
    ============================ Drive/Partition Info: =============================
    
    
    Drive: sda _____________________________________________________________________
    
    
    Disk /dev/sda: 64.0 GB, 64023257088 bytes
    255 heads, 63 sectors/track, 7783 cylinders, total 125045424 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 512 bytes
    
    
    Partition  Boot  Start Sector    End Sector  # of Sectors  Id System
    
    
    /dev/sda1                   1   125,045,423   125,045,423  ee GPT
    
    
    
    
    GUID Partition Table detected.
    
    
    Partition    Start Sector    End Sector  # of Sectors System
    /dev/sda1              34       195,346       195,313 EFI System partition
    /dev/sda2         195,347   108,474,643   108,279,297 Data partition (Windows/Linux)
    /dev/sda3     108,474,644   125,045,374    16,570,731 Swap partition (Linux)
    
    
    Drive: sdb _____________________________________________________________________
    
    
    Disk /dev/sdb: 750.2 GB, 750156374016 bytes
    255 heads, 63 sectors/track, 91201 cylinders, total 1465149168 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Sector size (logical/physical): 512 bytes / 4096 bytes
    
    
    Partition  Boot  Start Sector    End Sector  # of Sectors  Id System
    
    
    /dev/sdb1    *          1,979 1,424,185,343 1,424,183,365   7 NTFS / exFAT / HPFS
    /dev/sdb3       1,424,185,344 1,465,149,167    40,963,824  12 Compaq diagnostics
    
    
    
    
    "blkid" output: ________________________________________________________________
    
    
    Device           UUID                                   TYPE       LABEL
    
    
    /dev/sda1        1C97-E85B                              vfat       
    /dev/sda2        aadfc00d-845a-4085-a610-a77d4c8a0303   ext4       
    /dev/sda3        a534fe8a-1366-47e1-bb4a-84ac33edc986   swap       
    /dev/sdb1        49EF34B75D4CF4DA                       ntfs       
    /dev/sdb3        8AFADDE7FADDCF95                       ntfs       LENOVO_PART
    
    
    ================================ Mount points: =================================
    
    
    Device           Mount_Point              Type       Options
    
    
    /dev/sda1        /boot/efi                vfat       (rw)
    /dev/sda2        /                        ext4       (rw,errors=remount-ro)
    /dev/sdb1        /media/sdb1              fuseblk    (rw,nosuid,nodev,allow_other,blksize=4096)
    /dev/sdb3        /media/LENOVO_PART       fuseblk    (rw,nosuid,nodev,allow_other,default_permissions,blksize=4096)
    
    
    
    
    =========================== sda2/boot/grub/grub.cfg: ===========================
    
    
    --------------------------------------------------------------------------------
    #
    # DO NOT EDIT THIS FILE
    #
    # It is automatically generated by grub-mkconfig using templates
    # from /etc/grub.d and settings from /etc/default/grub
    #
    
    
    ### BEGIN /etc/grub.d/00_header ###
    if [ -s $prefix/grubenv ]; then
      set have_grubenv=true
      load_env
    fi
    set default="0"
    
    
    if [ x"${feature_menuentry_id}" = xy ]; then
      menuentry_id_option="--id"
    else
      menuentry_id_option=""
    fi
    
    
    export menuentry_id_option
    
    
    if [ "${prev_saved_entry}" ]; then
      set saved_entry="${prev_saved_entry}"
      save_env saved_entry
      set prev_saved_entry=
      save_env prev_saved_entry
      set boot_once=true
    fi
    
    
    function savedefault {
      if [ -z "${boot_once}" ]; then
        saved_entry="${chosen}"
        save_env saved_entry
      fi
    }
    
    
    function recordfail {
      set recordfail=1
      if [ -n "${have_grubenv}" ]; then if [ -z "${boot_once}" ]; then save_env recordfail; fi; fi
    }
    
    
    function load_video {
      if [ x$feature_all_video_module = xy ]; then
        insmod all_video
      else
        insmod efi_gop
        insmod efi_uga
        insmod ieee1275_fb
        insmod vbe
        insmod vga
        insmod video_bochs
        insmod video_cirrus
      fi
    }
    
    
    if [ x$feature_default_font_path = xy ] ; then
       font=unicode
    else
    insmod part_gpt
    insmod ext2
    set root='hd0,gpt2'
    if [ x$feature_platform_search_hint = xy ]; then
      search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  aadfc00d-845a-4085-a610-a77d4c8a0303
    else
      search --no-floppy --fs-uuid --set=root aadfc00d-845a-4085-a610-a77d4c8a0303
    fi
        font="/usr/share/grub/unicode.pf2"
    fi
    
    
    if loadfont $font ; then
      set gfxmode=auto
      load_video
      insmod gfxterm
      set locale_dir=$prefix/locale
      set lang=en_US
      insmod gettext
    fi
    terminal_output gfxterm
    if [ "${recordfail}" = 1 ]; then
      set timeout=-1
    else
      set timeout=5
    fi
    ### END /etc/grub.d/00_header ###
    
    
    ### BEGIN /etc/grub.d/05_debian_theme ###
    set menu_color_normal=white/black
    set menu_color_highlight=black/light-gray
    ### END /etc/grub.d/05_debian_theme ###
    
    
    ### BEGIN /etc/grub.d/06_mint_theme ###
    set menu_color_normal=white/black
    set menu_color_highlight=white/light-gray
    ### END /etc/grub.d/06_mint_theme ###
    
    
    ### BEGIN /etc/grub.d/10_linux ###
    function gfxmode {
        set gfxpayload="$1"
        if [ "$1" = "keep" ]; then
            set vt_handoff=vt.handoff=7
        else
            set vt_handoff=
        fi
    }
    if [ ${recordfail} != 1 ]; then
      if [ -e ${prefix}/gfxblacklist.txt ]; then
        if hwmatch ${prefix}/gfxblacklist.txt 3; then
          if [ ${match} = 0 ]; then
            set linux_gfx_mode=keep
          else
            set linux_gfx_mode=text
          fi
        else
          set linux_gfx_mode=text
        fi
      else
        set linux_gfx_mode=keep
      fi
    else
      set linux_gfx_mode=text
    fi
    export linux_gfx_mode
    if [ "$linux_gfx_mode" != "text" ]; then load_video; fi
    menuentry 'Linux Mint 14 Cinnamon 64-bit, 3.5.0-17-generic (/dev/sda2)' --class gnu-linux --class gnu --class os {
        recordfail
        gfxmode $linux_gfx_mode
        insmod gzio
        insmod part_gpt
        insmod ext2
        set root='hd0,gpt2'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  aadfc00d-845a-4085-a610-a77d4c8a0303
        else
          search --no-floppy --fs-uuid --set=root aadfc00d-845a-4085-a610-a77d4c8a0303
        fi
        linux    /boot/vmlinuz-3.5.0-17-generic root=UUID=aadfc00d-845a-4085-a610-a77d4c8a0303 ro   
        initrd    /boot/initrd.img-3.5.0-17-generic
    }
    menuentry 'Linux Mint 14 Cinnamon 64-bit, 3.5.0-17-generic (/dev/sda2) -- recovery mode' --class gnu-linux --class gnu --class os {
        recordfail
        insmod gzio
        insmod part_gpt
        insmod ext2
        set root='hd0,gpt2'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd0,gpt2 --hint-efi=hd0,gpt2 --hint-baremetal=ahci0,gpt2  aadfc00d-845a-4085-a610-a77d4c8a0303
        else
          search --no-floppy --fs-uuid --set=root aadfc00d-845a-4085-a610-a77d4c8a0303
        fi
        echo    'Loading Linux 3.5.0-17-generic ...'
        linux    /boot/vmlinuz-3.5.0-17-generic root=UUID=aadfc00d-845a-4085-a610-a77d4c8a0303 ro recovery nomodeset 
        echo    'Loading initial ramdisk ...'
        initrd    /boot/initrd.img-3.5.0-17-generic
    }
    ### END /etc/grub.d/10_linux ###
    
    
    ### BEGIN /etc/grub.d/10_lupin ###
    ### END /etc/grub.d/10_lupin ###
    
    
    ### BEGIN /etc/grub.d/20_linux_xen ###
    
    
    ### END /etc/grub.d/20_linux_xen ###
    
    
    ### BEGIN /etc/grub.d/20_memtest86+ ###
    ### END /etc/grub.d/20_memtest86+ ###
    
    
    ### BEGIN /etc/grub.d/30_os-prober ###
    menuentry 'Windows 7 (loader) (on /dev/sdb1)' --class windows --class os $menuentry_id_option 'osprober-chain-49EF34B75D4CF4DA' {
        insmod part_msdos
        insmod ntfs
        set root='hd1,msdos1'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos1 --hint-efi=hd1,msdos1 --hint-baremetal=ahci1,msdos1  49EF34B75D4CF4DA
        else
          search --no-floppy --fs-uuid --set=root 49EF34B75D4CF4DA
        fi
        chainloader +1
    }
    menuentry 'Windows Recovery Environment (loader) (on /dev/sdb3)' --class windows --class os $menuentry_id_option 'osprober-chain-8AFADDE7FADDCF95' {
        insmod part_msdos
        insmod ntfs
        set root='hd1,msdos3'
        if [ x$feature_platform_search_hint = xy ]; then
          search --no-floppy --fs-uuid --set=root --hint-bios=hd1,msdos3 --hint-efi=hd1,msdos3 --hint-baremetal=ahci1,msdos3  8AFADDE7FADDCF95
        else
          search --no-floppy --fs-uuid --set=root 8AFADDE7FADDCF95
        fi
        drivemap -s (hd0) ${root}
        chainloader +1
    }
    ### END /etc/grub.d/30_os-prober ###
    
    
    ### BEGIN /etc/grub.d/30_uefi-firmware ###
    ### END /etc/grub.d/30_uefi-firmware ###
    
    
    ### BEGIN /etc/grub.d/40_custom ###
    # This file provides an easy way to add custom menu entries.  Simply type the
    # menu entries you want to add after this comment.  Be careful not to change
    # the 'exec tail' line above.
    ### END /etc/grub.d/40_custom ###
    
    
    ### BEGIN /etc/grub.d/41_custom ###
    if [ -f  ${config_directory}/custom.cfg ]; then
      source ${config_directory}/custom.cfg
    elif [ -z "${config_directory}" -a -f  $prefix/custom.cfg ]; then
      source $prefix/custom.cfg;
    fi
    ### END /etc/grub.d/41_custom ###
    --------------------------------------------------------------------------------
    
    
    =========================== sda2/boot/burg/burg.cfg: ===========================
    
    
    --------------------------------------------------------------------------------
    #
    # DO NOT EDIT THIS FILE
    #
    # It is automatically generated by /usr/sbin/burg-mkconfig using templates
    # from /etc/burg.d and settings from /etc/default/burg
    #
    
    
    ### BEGIN /etc/burg.d/00_header ###
    set theme_name=burg
    set gfxmode=640x480
    if [ -s $prefix/burgenv ]; then
      load_env
    fi
    set default="0"
    if [ ${prev_saved_entry} ]; then
      set saved_entry=${prev_saved_entry}
      save_env saved_entry
      set prev_saved_entry=
      save_env prev_saved_entry
      set boot_once=true
    fi
    
    
    function savedefault {
      if [ -z ${boot_once} ]; then
        saved_entry=${chosen}
        save_env saved_entry
      fi
    }
    function select_menu {
      if menu_popup -t template_popup theme_menu ; then
        free_config template_popup template_subitem menu class screen
        load_config ${prefix}/themes/${theme_name}/theme ${prefix}/themes/custom/theme_${theme_name}
        save_env theme_name
        menu_refresh
      fi
    }
    function toggle_fold {
      if test -z $theme_fold ; then
        set theme_fold=1
      else
        set theme_fold=
      fi
      save_env theme_fold
      menu_refresh
    }
    function select_resolution {
      if menu_popup -t template_popup resolution_menu ; then
        menu_reload_mode
        save_env gfxmode
      fi
    }
    if test -f ${prefix}/themes/${theme_name}/theme ; then
      insmod coreui
      menu_region.text
      load_string '+theme_menu { -arabic_and_freedom { command="set theme_name=arabic_and_freedom" }}'
      load_string '+theme_menu { -black_and_white { command="set theme_name=black_and_white" }}'
      load_string '+theme_menu { -burg { command="set theme_name=burg" }}'
      load_string '+theme_menu { -chiva { command="set theme_name=chiva" }}'
      load_string '+theme_menu { -coffee { command="set theme_name=coffee" }}'
      load_string '+theme_menu { -minimum { command="set theme_name=minimum" }}'
      load_string '+theme_menu { -proto { command="set theme_name=proto" }}'
      load_string '+theme_menu { -radiance { command="set theme_name=radiance" }}'
      load_string '+theme_menu { -radiancetext { command="set theme_name=radiancetext" }}'
      load_string '+theme_menu { -refit { command="set theme_name=refit" }}'
      load_string '+theme_menu { -sora { command="set theme_name=sora" }}'
      load_string '+theme_menu { -sora_clean { command="set theme_name=sora_clean" }}'
      load_string '+theme_menu { -sora_extended { command="set theme_name=sora_extended" }}'
      load_string '+theme_menu { -ubuntu { command="set theme_name=ubuntu" }}'
      load_string '+theme_menu { -ubuntu2 { command="set theme_name=ubuntu2" }}'
      load_string '+theme_menu { -winter { command="set theme_name=winter" }}'
      load_config ${prefix}/themes/conf.d/10_hotkey
      load_config ${prefix}/themes/${theme_name}/theme ${prefix}/themes/custom/theme_${theme_name}
      insmod vbe
      insmod png
      insmod jpeg
      set gfxfont="Unifont Regular 16"
      menu_region.gfx
      vmenu resolution_menu
      controller.ext
    fi
    insmod ext2
    set root='(hd0,2)'
    search --no-floppy --fs-uuid --set aadfc00d-845a-4085-a610-a77d4c8a0303
    set locale_dir=($root)/boot/burg/locale
    set lang=en
    insmod gettext
    set timeout=5
    ### END /etc/burg.d/00_header ###
    
    
    ### BEGIN /etc/burg.d/10_linux ###
    menuentry 'LinuxMint GNU/Linux, with Linux 3.5.0-17-generic' --class linuxmint --class gnu-linux --class gnu --class os --group group_main {
        insmod ext2
        set root='(hd0,2)'
        search --no-floppy --fs-uuid --set aadfc00d-845a-4085-a610-a77d4c8a0303
        echo    'Loading Linux 3.5.0-17-generic ...'
        linux    /boot/vmlinuz-3.5.0-17-generic root=UUID=aadfc00d-845a-4085-a610-a77d4c8a0303 ro  quiet splash
        echo    'Loading initial ramdisk ...'
        initrd    /boot/initrd.img-3.5.0-17-generic
    }
    menuentry 'LinuxMint GNU/Linux, with Linux 3.5.0-17-generic (recovery mode)' --class linuxmint --class gnu-linux --class gnu --class os --group group_main {
        insmod ext2
        set root='(hd0,2)'
        search --no-floppy --fs-uuid --set aadfc00d-845a-4085-a610-a77d4c8a0303
        echo    'Loading Linux 3.5.0-17-generic ...'
        linux    /boot/vmlinuz-3.5.0-17-generic root=UUID=aadfc00d-845a-4085-a610-a77d4c8a0303 ro single 
        echo    'Loading initial ramdisk ...'
        initrd    /boot/initrd.img-3.5.0-17-generic
    }
    ### END /etc/burg.d/10_linux ###
    
    
    ### BEGIN /etc/burg.d/30_os-prober ###
    menuentry "Windows 7 (loader) (on /dev/sdb1)" --class windows --class os {
        insmod ntfs
        set root='(hd1,1)'
        search --no-floppy --fs-uuid --set 49ef34b75d4cf4da
        chainloader +1
    }
    menuentry "Windows Recovery Environment (loader) (on /dev/sdb3)" --class windows --class os {
        insmod ntfs
        set root='(hd1,3)'
        search --no-floppy --fs-uuid --set 8afadde7faddcf95
        drivemap -s (hd0) ${root}
        chainloader +1
    }
    ### END /etc/burg.d/30_os-prober ###
    
    
    ### BEGIN /etc/burg.d/40_custom ###
    # This file provides an easy way to add custom menu entries.  Simply type the
    # menu entries you want to add after this comment.  Be careful not to change
    # the 'exec tail' line above.
    ### END /etc/burg.d/40_custom ###
    --------------------------------------------------------------------------------
    
    
    =============================== sda2/etc/fstab: ================================
    
    
    --------------------------------------------------------------------------------
    # /etc/fstab: static file system information.
    #
    # <file system> <mount point>   <type>  <options>       <dump>  <pass>
    
    
    proc    /proc    proc    nodev,noexec,nosuid    0    0
    #Entry for /dev/sda2 :
    UUID=aadfc00d-845a-4085-a610-a77d4c8a0303    /    ext4    errors=remount-ro    0    1
    #Entry for /dev/sda1 :
    UUID=1C97-E85B    /boot/efi    vfat    defaults    0    1
    #Entry for /dev/sdb3 :
    UUID=8AFADDE7FADDCF95    /media/LENOVO_PART    ntfs    defaults,nls=utf8,umask=0222    0    0
    #Entry for /dev/sdb1 :
    UUID=49EF34B75D4CF4DA    /media/sdb1    ntfs-3g    defaults,locale=en_US.UTF-8    0    0
    #Entry for /dev/sda3 :
    UUID=a534fe8a-1366-47e1-bb4a-84ac33edc986    none    swap    sw    0    0
    
    
    
    
    --------------------------------------------------------------------------------
    
    
    ====================== sda2/boot/extlinux/extlinux.conf: =======================
    
    
    --------------------------------------------------------------------------------
    ## /boot/extlinux/extlinux.conf
    ##
    ## IMPORTANT WARNING
    ##
    ## The configuration of this file is generated automatically.
    ## Do not edit this file manually, use: extlinux-update
    
    
    
    
    default l0
    prompt 1
    timeout 50
    
    
    include themes/debian/theme.cfg
    --------------------------------------------------------------------------------
    
    
    =================== sda2: Location of files loaded by Grub: ====================
    
    
               GiB - GB             File                                 Fragment(s)
    
    
      44.359673977 = 47.630837248   boot/burg/burg.cfg                             2
       4.222077847 = 4.533421568    boot/burg/core.img                             1
      44.447198391 = 47.724815872   boot/grub/grub.cfg                             1
      44.302648067 = 47.569606144   boot/initrd.img-3.5.0-17-generic               1
       4.226899624 = 4.538598912    boot/vmlinuz-3.5.0-17-generic                  1
      44.302648067 = 47.569606144   initrd.img                                     1
      44.302648067 = 47.569606144   initrd.img.old                                 1
       4.226899624 = 4.538598912    vmlinuz                                        1
    
    
    ================= sda2: Location of files loaded by Syslinux: ==================
    
    
               GiB - GB             File                                 Fragment(s)
    
    
       4.221810818 = 4.533134848    boot/extlinux/chain.c32                        1
       4.273004055 = 4.588103168    boot/extlinux/extlinux.conf                    1
    
    
    ============== sda2: Version of COM32(R) files used by Syslinux: ===============
    
    
     boot/extlinux/chain.c32            :  COM32R module (v4.xx)
    I lost the thread (no pun intended) from there. Any ideas?

  2. #2
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
    Beans
    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Windows doesn't load: Invalid EFI File Path

    You have mixed UEFI and BIOS boot.

    Windows on sdb is configured for BIOS boot and MBR(msdos) partitioning.
    Your sda has an efi partition with gpt partitioning and is trying to use UEFI to boot.
    Ubuntu will boot from gpt partitioned drives in BIOS mode, but needs a tiny 1MB unformatted bios_grub partition not the efi partition. But how you install is determined by how you boot installer. If you boot installer in UEFI mode it installs in UEFI.

    Windows only boots in UEFI mode from gpt partitioned drives.
    Windows boots from MBR drives in BIOS or legacy mode.
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  3. #3
    Join Date
    Mar 2013
    Beans
    4

    Re: Windows doesn't load: Invalid EFI File Path

    Thanks for the response. So, from what I understand, my HDD and SSD are formatted differently and are therefore incompatible?
    More importantly, what can I do? If I reformat the drive, how do I avoid this error again?

  4. #4
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
    Beans
    Hidden!
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Windows doesn't load: Invalid EFI File Path

    While I now prefer gpt partitioning, you need to convert your SSD from gpt back to MBR and reinstall Linux in BIOS/MBR mode. With both systems is BIOS mode you should not have any issues.

    How you boot installer is how it installs, so be sure to boot in Legacy/BIOS/CSM mode not UEFI mode to install Linux.

    You may be able to convert, but that may not be easier than a new install?

    Converting to or from GPT
    http://www.rodsbooks.com/gdisk/mbr2gpt.html
    You then need to use gdisk to convert from gpt to MBR
    http://www.rodsbooks.com/gdisk/mbr2gpt.html#gpt2mbr
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  5. #5
    Join Date
    Mar 2013
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    4

    Re: Windows doesn't load: Invalid EFI File Path

    Thanks! I'll do that. But if possible, can you explain (or give a link that explains) what exactly UEFI, MBR, GPT, CSM, and BIOS are? I'm confused.
    P.S. On second thought, should I post this in the beginners' forum?

  6. #6
    Join Date
    Jun 2009
    Location
    Chicago Suburbs
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    Ubuntu 14.04 Trusty Tahr

    Re: Windows doesn't load: Invalid EFI File Path

    Some links:
    gpt(GUID) and MBR(msdos) are two ways to partition a drive.
    The MBR is the first sector of a hard drive that a BIOS uses. BIOS determines hardware and then jumps to MBR to start to boot a computer.
    UEFI is a new replacement for BIOS, but has a BIOS mode also also known as CSM. UEFI looks into efi partition for more boot code.
    Compatibility Support Module (CSM), which emulates a BIOS mode

    MBR details including 2TiB limit and GPT link
    http://en.wikipedia.org/wiki/Master_boot_record

    http://www.ibm.com/developerworks/linux/library/l-gpt/
    http://en.wikipedia.org/wiki/GUID_Partition_Table

    More technical:
    https://wiki.archlinux.org/index.php...ware_Interface
    https://wiki.archlinux.org/index.php/UEFI
    https://wiki.archlinux.org/index.php/GPT
    https://wiki.archlinux.org/index.php/Grub2
    http://www.rodsbooks.com/efi-bootloaders/
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







  7. #7
    Join Date
    Mar 2013
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    4

    Re: Windows doesn't load: Invalid EFI File Path

    Thanks. I used gdisk to change /dev/sdb (the Windows disk) to GPT, but the same error still happens. My BIOS is UEFI-capable, and Windows 7 should boot from a GPT disk. But that doesn't seem to have anything to do with the "Invalid EFI file path" error. Ideas?

  8. #8
    Join Date
    Jun 2009
    Location
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    Ubuntu 14.04 Trusty Tahr

    Re: Windows doesn't load: Invalid EFI File Path

    You cannot just convert Windows to UEFI boot. Not sure of all the details but it has to have some unformatted space in the partition just before the main Windows install and you have to have an efi partition, usually first, but many Windows installs have a repair partition or recovery partition first. It is a lot of change. It may be easier just to reinstall in UEFI mode. You have to boot installer in UEFI mode.

    Even with Ubuntu you have to convert from BIOS boot to UEFI boot. It primarily is changing boot loader from grub-pc(BIOS) to grub-efi (UEFI) and editing fstab to use efi partition.

    Microsoft suggested partitions including reserved partition for gpt & UEFI:
    http://technet.microsoft.com/en-us/l...8WS.10%29.aspx
    Older Windows info on gpt - 2008 updated 2011
    http://msdn.microsoft.com/en-us/wind.../gg463525.aspx
    Windows technical info on gpt and GUIDs
    http://msdn.microsoft.com/library/wi...sktop/aa365449
    Order on drive is important:
    http://en.wikipedia.org/wiki/Microso...rved_Partition

    You cannot use the Win7 DVD in UEFI mode, you need to use BIOS mode or modify to USB with UEFI.
    http://linux.dell.com/cgi-bin/gitweb...README;hb=HEAD
    http://software.intel.com/en-us/arti...and-scripting/
    Convert Windows USB flash install to UEFI boot
    http://jake.io/b/2011/installing-win...x220-from-usb/
    Install Windows efi to new drive.
    http://technet.microsoft.com/en-us/l...=ws.10%29.aspx
    https://gitorious.org/tianocore_uefi..._UEFI_boot_USB
    For info on UEFI boot install & repair:
    http://ubuntuforums.org/showthread.php?t=2147295
    Please use Thread Tools above first post to close thread when/if answered completely.







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