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Cant Access XP after Win 7 installation

    Question

  • Hi,
         I have Windows XP installed in my PC.After that I tried to install Windows 7.But after the Win7 installation I am not getting any OS selection option at startup.The PC boot into Win 7 directly.

     I tried EasyBCD.I tried to create an entry for Win XP .Then it showed a NTDETECT error.Then I downloaded the NTLDR files and extracted to the root of the drive.Thus I created an entry for XP.

      After the reboot I got an OS selection screen.But when I tried to select the Win XP option, I am getting the error message "Invalid Boot.ini/NTDETECT Failed "

    What should I do ?
    Saturday, May 16, 2009 5:43 PM

Answers

  • I dont know exact error !
    but it seems like i have a solution.

    Insert WinXp cd and repair installation(give repair option when cd detects in which partition you have installed win xp)

    and then use EasyBCD or Vista Boot Pro
    it will work. I did this thing when same prob with XP and vista happens to me
    • Marked as answer by Nick FV Tuesday, June 09, 2009 6:12 PM
    Saturday, May 16, 2009 8:25 PM

All replies

  • Have You installed Win7 in the same partition where XP
    was installed? The absence of NTLDR in the root directory
    of C: suggests this possibility. If this was the case, then
    You can not boot into XP anymore. Though all XP's
    files and folders are saved inside the folder Windows.old.

    One of the ways to restore XP simultaneously saving Win7 installation
    is:
    1) to create a separate partition for Win7;
    2) Copy all Win7 files from C: to that partition.
    For the purpose one is to boot from Win7 DVD,
    and copy files and folders from the command line,
    because otherwise the system can forbid copying of
    some important files;
    3) Add Win7 on another partition to the boot menu
    with EasyBCD;
    4) Boot to the second copy of Win7;
    5) Delete Win7 files on the first partition (the letter assigned to this
    partition by the second Win7 copy will not be C:, but some other one).
    6) Move all files and folders from Windows.old to the root;
    7) Add XP to the boot menu with EasyBCD);
    8) Delete the first Win7 entry from the boot menu.
    • Edited by Vlad0 Saturday, May 16, 2009 6:15 PM
    Saturday, May 16, 2009 5:56 PM
  • I dont know exact error !
    but it seems like i have a solution.

    Insert WinXp cd and repair installation(give repair option when cd detects in which partition you have installed win xp)

    and then use EasyBCD or Vista Boot Pro
    it will work. I did this thing when same prob with XP and vista happens to me
    • Marked as answer by Nick FV Tuesday, June 09, 2009 6:12 PM
    Saturday, May 16, 2009 8:25 PM
  • Insert WinXp cd and repair installation(give repair option when cd detects in which partition you have installed win xp)
    I am not sure that cd will detect XP if Win7 have moved all XP files
    inside Windows.old folder. And if this is not the case, i.e.
    Win 7 was installed in the separate partition and XP
    files were left intact, so that XP CD can detect them and repair
    the installation, then Win 7 will fail to boot. Just because
    during the repair the Win7 boot sector on the boot drive
    will be replaced by that of XP. And XP uses his own bootmanager
    NTLDR, and not that of Vista/Win7 (BOOTMGR).
    Sunday, May 17, 2009 4:58 PM
  • yes you are right vlad
    if the Win7 is installed over xp on same partition that XP CD will not find any xp OS installed partition.
    Sunday, May 17, 2009 5:16 PM
  • Install a fresh copy of Windows Xp in a new partition. Its just gonna take a few minutes.
    Dont forget to save your important documents before you proceed.
    Instead of waiting for a long time to get this problem solved, its better to proceed on with the new installation where you are not going to lose any data but just a few minutes.
    Monday, May 18, 2009 4:26 AM