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Thread: Windows hates Grub-- won't let me back in

  1. #1
    Join Date
    Sep 2006
    Beans
    19

    Windows hates Grub-- won't let me back in

    Thank you for reading.

    I can't get into my Windows installation. I've been having problems with grub-- somehow after the last ubuntu updates it was pointing to the incorrect partition to start windows, which I changed back and got into win. But now I get to a screen asking me to boot into safe mode, safe mode with networking, etc., etc. After I make a choice I see the white ascii bar on the bottom fill up and instantly the system restarts, just before I'd get the login screen.

    I've tried pointing to all the partitions on both disks of my system, I've tried doing the map one drive to the other (map hd1 hd0/ map hd0 hd1), and then it complains that NTLDR is missing. I'm boggled here.

    Here's the win entry for GRUB:

    rootnoverify (hd1,0)
    chainloader +1
    savedefault
    makeactive

    fdisk -l says:
    cannot open /dev/sda
    cannot open /dec/sdb

    I've done some stuff to make sure it wasn't the disk (full long test in seatools from the UBCD) or windows config (tried last known good config; tried do not restart on system error) to no avail. I remember this happening on a system I setup at work to dual boot, but I think the remap solved it there.

    Please help!
    Last edited by tmoneygetpaid; April 17th, 2009 at 07:41 PM.

  2. #2
    Join Date
    Jul 2005
    Location
    Hughenden, Australia
    Beans
    5,096
    Distro
    Ubuntu 14.04 Trusty Tahr

    Re: Windows hates Grub-- won't let me back in

    I can't get into my Windows installation. I've been having problems with grub-- somehow after the last ubuntu updates it was pointing to the incorrect partition to start windows, which I changed back and got into win. But now I get to a screen asking me to boot into safe mode, safe mode with networking, etc., etc. After I make a choice I see the white ascii bar on the bottom fill up and instantly the system restarts, just before I'd get the login screen.
    If you have the Windows screen asking if you want to boot into 'safe mode' or 'normal boot' and so on, you are already in Windows, or at least you're in the Windows boot loader and GRUB has already done it's job of chainloading Windows. Most likely, your problem has nothing to do with Ubuntu or GRUB, but you have a Windows problem.

    Sometimes Windows problems are easy to fix and sometimes they can take days and be extremely complicated. I would begin by booting your Windows XP 'Installation CD', open a Windows XP Recovery Console and run CHKDSK /F or CHKDSK /R.

    If your Windows still won't boot after that, it could have any problem from third party software compatibilty problems to viruses and so on. Who knows?

    It might still be interesting to see your fdisk output anyway,
    Code:
    sudo fdisk -lu
    and at least the bottom half of your /boot/grub/menu.lst too if you like,
    Code:
    gksudo gedit /boot/grub/menu.lst
    Regards, Herman
    Ubuntu user since 2004 (Warty Warthog)

  3. #3
    Join Date
    Sep 2006
    Beans
    19

    Re: Windows hates Grub-- won't let me back in

    You're surely right-- I let windows install its own bootloader to the MBR and tried to boot and, still, no dice. So it's something there.

    Going to post these anyway. And I'm going to boot into the recovery console right now and run those commands.

    Thanks a lot.

    fdisk:
    Quote Originally Posted by fdisk
    Disk /dev/sda: 500.1 GB, 500107862016 bytes
    255 heads, 63 sectors/track, 60801 cylinders, total 976773168 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Disk identifier: 0x0004b8cc

    Device Boot Start End Blocks Id System
    /dev/sda1 * 63 327677804 163838871 7 HPFS/NTFS
    /dev/sda2 327677805 587320334 129821265 7 HPFS/NTFS
    /dev/sda3 971241705 976768064 2763180 5 Extended
    /dev/sda4 893117610 971241704 39062047+ 83 Linux
    /dev/sda5 971241768 976768064 2763148+ 82 Linux swap / Solaris

    Partition table entries are not in disk order

    Disk /dev/sdb: 250.0 GB, 250059350016 bytes
    255 heads, 63 sectors/track, 30401 cylinders, total 488397168 sectors
    Units = sectors of 1 * 512 = 512 bytes
    Disk identifier: 0x0003b39a

    Device Boot Start End Blocks Id System
    /dev/sdb1 * 63 245762369 122881153+ 7 HPFS/NTFS
    /dev/sdb2 2457
    menu.lst:
    Quote Originally Posted by menu.lst
    title Ubuntu 8.10, kernel 2.6.27-7-generic (recovery mode)
    kernel /boot/vmlinuz-2.6.27-7-generic root=UUID=d3c63bdf-94b0-4e8b-84f3-eea41ce73525 ro single
    initrd /boot/initrd.img-2.6.27-7-generic

    title Ubuntu 8.10, memtest86+
    kernel /boot/memtest86+.bin

    ### END DEBIAN AUTOMAGIC KERNELS LIST

    title Other operating systems:
    root

    title Microsoft Windows XP Professional
    rootnoverify (hd1,0)
    chainloader +1
    savedefault
    makeactive

  4. #4
    Join Date
    Sep 2006
    Beans
    19

    Re: Windows hates Grub-- won't let me back in

    chkdsk /r didn't solve this.

    going to try a malicious software scan.

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