ubuntu cannot recognize windows

[beyondlimit]

I was installing ubuntu boot from usb ,half way it says:the computer currently has no detected operationg system... my windows version is win7,can any body help me?

[darkod]

Half way?

At the start of the install process it should show if another OS is detected or not. It can't "change its mind" half way trough.

So did the installation finish? Can you boot ubuntu now?

[beyondlimit]

Time is not the point,maybe i have not stated precisely.The point is it said.
Or can you tell me how does ubuntu read the information of other OS so that maybe i could figure out how to fix that?

[beyondlimit]

When it told me that,i stopped the installation

[darkod]

Ubuntu detects the boot files. If for any reason the files are deleted or not present, it doesn't detect it.
There can be other reason, if the disk is Dynamic in windows, and not Basic, if it was used in raid earlier, etc.

So, does windows boot now? Did you stop the installation before it started partitioning your disk?

You can run the boot info script from the link in my signature, and post the results as explained there. You can do that from ubuntu live mode. That will show more details.

Alternatively, if windows can boot, open Disk Management and check if the hdd is Dynamic or Basic.
Also tell us if you used it in raid earlier.

[ThomasAndersn]

well you need to repair ur windows 7, as:
Boot from Windows 7 DVD & when it say install now click on repair windows.
In the next box it search for windows after search complete don't select any OS & click next.
Now select the command prompt and run the following:
Fixmbr
Fixboot
& than restart ur computer.

I hope this will work for u.

[beyondlimit]

Yea, when i buy my hp deskop i didn't know i can got a win7 dvd.Since two years has passed i can no longer get a one.I used easyBCD to fix this ,but now i even can not start win7,it said no valid entry in boot.What a tragic

[darkod]

Run the boot info script as suggested in my previous post. We can't help you blind, we have no idea what you have on your computer.

[beyondlimit]

Boot Info Script 0.60 from 17 May 2011


============================= Boot Info Summary: ===============================

=> Windows is installed in the MBR of /dev/sda.
=> Syslinux MBR (4.04 and higher) is installed in the MBR of /dev/sdb.

sda1: __________________________________________________ ________________________

File system: ntfs
Boot sector type: Windows Vista/7
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files: /boot.ini /bootmgr /Boot/BCD /ntldr /NTDETECT.COM

sda2: __________________________________________________ ________________________

File system: ntfs
Boot sector type: Windows Vista/7
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

sda3: __________________________________________________ ________________________

File system: Extended Partition
Boot sector type: Unknown
Boot sector info:

sda5: __________________________________________________ ________________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: According to the info in the boot sector, sda5 starts
at sector 63.
Operating System:
Boot files:

sda6: __________________________________________________ ________________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: According to the info in the boot sector, sda6 starts
at sector 63.
Operating System:
Boot files:

sda7: __________________________________________________ ________________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: According to the info in the boot sector, sda7 starts
at sector 63.
Operating System:
Boot files:

sda8: __________________________________________________ ________________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: According to the info in the boot sector, sda8 starts
at sector 0.
Operating System:
Boot files:

sda4: __________________________________________________ ________________________

File system: ntfs
Boot sector type: Windows XP
Boot sector info: No errors found in the Boot Parameter Block.
Operating System:
Boot files: /boot/BCD

sdb1: __________________________________________________ ________________________

File system: vfat
Boot sector type: SYSLINUX 4.05 2011-12-09
Boot sector info: Syslinux looks at sector 1697256 of /dev/sdb1 for its
second stage. SYSLINUX is installed in the directory.
The integrity check of the ADV area failed. No errors
found in the Boot Parameter Block.
Operating System:
Boot files: /syslinux.cfg /syslinux/syslinux.cfg /ldlinux.sys

============================ Drive/Partition Info: =============================

Drive: sda __________________________________________________ ___________________

Disk /dev/sda: 320.1 GB, 320072933376 bytes
255 heads, 63 sectors/track, 38913 cylinders, total 625142448 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 * 2,048 616,447 614,400 7 NTFS / exFAT / HPFS
/dev/sda2 616,448 77,304,779 76,688,332 7 NTFS / exFAT / HPFS
/dev/sda3 77,302,795 589,496,311 512,193,517 f W95 Extended (LBA)
/dev/sda5 77,304,843 118,447,244 41,142,402 7 NTFS / exFAT / HPFS
/dev/sda6 118,447,308 224,508,374 106,061,067 7 NTFS / exFAT / HPFS
/dev/sda7 224,508,438 438,494,174 213,985,737 7 NTFS / exFAT / HPFS
/dev/sda8 438,505,472 589,496,311 150,990,840 7 NTFS / exFAT / HPFS
/dev/sda4 589,505,175 625,137,344 35,632,170 7 NTFS / exFAT / HPFS

/dev/sda2 overlaps with /dev/sda3

Drive: sdb __________________________________________________ ___________________

Disk /dev/sdb: 4041 MB, 4041211904 bytes
255 heads, 63 sectors/track, 491 cylinders, total 7892992 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/sdb1 * 63 7,892,991 7,892,929 c W95 FAT32 (LBA)


"blkid" output: __________________________________________________ ______________

Device UUID TYPE LABEL

/dev/loop0 squashfs
/dev/sda1 EA5ADFF45ADFBB8F ntfs SYSTEM
/dev/sda2 01CB5F0F522E8640 ntfs donnot touch!!
/dev/sda4 9874ABE474ABC37C ntfs K
/dev/sda5 01CCF3630A1211D0 ntfs 娱乐
/dev/sda6 01CCF38AF450BC70 ntfs 实用工具
/dev/sda7 01CCF38AA154AFE0 ntfs j
/dev/sda8 2FB8047CB15E3264 ntfs 工作
/dev/sdb1 0008-611E vfat PENDRIVE

================================ Mount points: =================================

Device Mount_Point Type Options

/dev/loop0 /rofs squashfs (ro,noatime)
/dev/sdb1 /cdrom vfat (ro,noatime,fmask=0022,dmask=0022,codepage=cp437,i ocharset=iso8859-1,shortname=mixed,errors=remount-ro)


================================ sda1/boot.ini: ================================

--------------------------------------------------------------------------------
[boot loader]
timeout=30
default=multi(0)disk(0)rdisk(0)partition(7)\WINDOW S
[operating systems]
multi(0)disk(0)rdisk(0)partition(7)\WINDOWS="Micro soft Windows XP Professional" /noexecute=optin /fastdetect
--------------------------------------------------------------------------------

============================== sdb1/syslinux.cfg: ==============================

--------------------------------------------------------------------------------
default menu.c32
prompt 0
menu title UNetbootin
timeout 100

label unetbootindefault
menu label Default
kernel /ubnkern
append initrd=/ubninit file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash --

label ubnentry0
menu label ^Help
kernel /ubnkern
append initrd=/ubninit

label ubnentry1
menu label ^Try Ubuntu without installing
kernel /casper/vmlinuz
append initrd=/casper/initrd.lz file=/cdrom/preseed/ubuntu.seed boot=casper quiet splash --

label ubnentry2
menu label ^Install Ubuntu
kernel /casper/vmlinuz
append initrd=/casper/initrd.lz file=/cdrom/preseed/ubuntu.seed boot=casper only-ubiquity quiet splash --

label ubnentry3
menu label ^Check disc for defects
kernel /casper/vmlinuz
append initrd=/casper/initrd.lz boot=casper integrity-check quiet splash --

label ubnentry4
menu label Test ^memory
kernel /install/mt86plus
append initrd=/ubninit

label ubnentry5
menu label ^Boot from first hard disk
kernel /ubnkern
append initrd=/ubninit

--------------------------------------------------------------------------------

========================= sdb1/syslinux/syslinux.cfg: ==========================

--------------------------------------------------------------------------------
# D-I config version 2.0
include menu.cfg
default vesamenu.c32
prompt 0
timeout 50

# If you would like to use the new menu and be presented with the option to install or run from USB at startup, remove # from the following line. This line was commented out (by request of many) to allow the old menu to be presented and to enable booting straight into the Live Environment!
# ui gfxboot bootlogo
--------------------------------------------------------------------------------

================= sdb1: Location of files loaded by Syslinux: ==================

GiB - GB File Fragment(s)

?? = ?? ldlinux.sys 1
?? = ?? menu.c32 1
?? = ?? syslinux.cfg 1
?? = ?? syslinux/chain.c32 1
?? = ?? syslinux/gfxboot.c32 1
?? = ?? syslinux/syslinux.cfg 1
?? = ?? syslinux/vesamenu.c32 1

============== sdb1: Version of COM32(R) files used by Syslinux: ===============

menu.c32 : COM32R module (v4.xx)
syslinux/chain.c32 : COM32R module (v4.xx)
syslinux/gfxboot.c32 : COM32R module (v4.xx)
syslinux/vesamenu.c32 : COM32R module (v4.xx)

======================== Unknown MBRs/Boot Sectors/etc: ========================

Unknown BootLoader on sda3

00000000 27 60 fa 60 10 62 1f 66 5f 66 29 73 f9 73 db 76 |'`.`.b.f_f)s.s.v|
00000010 01 77 6c 7b fe ff fe ff fe ff fe ff fe ff fe ff |.wl{............|
00000020 fe ff fe ff fe ff fe ff fe ff fe ff fe ff fe ff |................|
*
000000d0 fe ff fe ff 56 80 72 80 65 81 a0 8a 92 91 16 4e |....V.r.e......N|
000000e0 e2 52 72 6b 17 6d 05 7a 39 7b 30 7d 6f f9 b0 8c |.Rrk.m.z9{0}o...|
000000f0 ec 53 2f 56 51 58 b5 5b 0f 5c 11 5c e2 5d 40 62 |.S/VQX.[.\.\.]@b|
00000100 83 63 14 64 2d 66 b3 68 bc 6c 88 6d af 6e 1f 70 |.c.d-f.h.l.m.n.p|
00000110 a4 70 d2 71 26 75 8f 75 8e 75 19 76 11 7b e0 7b |.p.q&u.u.u.v.{.{|
00000120 2b 7c 20 7d 39 7d 2c 85 6d 85 07 86 34 8a 0d 90 |+| }9},.m...4...|
00000130 61 90 b5 90 b7 92 f6 97 37 9a d7 4f 6c 5c 5f 67 |a.......7..Ol\_g|
00000140 91 6d 9f 7c 8c 7e 16 8b 16 8d 1f 90 6b 5b fd 5d |.m.|.~......k[.]|
00000150 0d 64 c0 84 5c 90 e1 98 87 73 8b 5b 9a 60 7e 67 |.d..\....s.[.`~g|
00000160 de 6d 1f 8a a6 8a 01 90 0c 98 37 52 70 f9 51 70 |.m........7Rp.Qp|
00000170 8e 78 96 93 70 88 d7 91 ee 4f d7 53 fd 55 da 56 |.x..p....O.S.U.V|
00000180 82 57 fd 58 c2 5a 88 5b ab 5c c0 5c 25 5e 01 61 |.W.X.Z.[.\.\%^.a|
00000190 fe ff fe ff fe ff fe ff fe ff fe ff fe ff fe ff |................|
*
000001b0 fe ff fe ff fe ff fe ff fe ff fe ff fe ff 00 fe |................|
000001c0 ff ff 07 fe ff ff 00 08 00 00 82 c8 73 02 00 fe |............s...|
000001d0 ff ff 05 fe ff ff 82 d0 73 02 4a 5d 52 06 00 00 |........s.J]R...|
000001e0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 |................|
000001f0 00 00 00 00 00 00 00 00 00 00 00 00 00 00 55 aa |..............U.|
00000200


=============================== StdErr Messages: ===============================

boot_info_script.sh: line 1579: [: 2.73495e+09: integer expression expected

[beyondlimit]

Above is what i got by did what you suggested