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Thread: Unable to boot in XP after installing Windows 7 - Dual boot issue

  1. #1
    darkantwan is offline New Member
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    Question Unable to boot in XP after installing Windows 7 - Dual boot issue

    Hi,

    i installed windows 7 on C:\ and i have XP on D:\



    how do i boot into XP

    i tried osl2000 but it said error reading disk press ctrl-alt-del

  2. #2
    ravi_9793's Avatar
    ravi_9793 is offline Senior Member
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    Off topic:
    where did you get win7 setup?? Is it available for public test??

  3. #3
    rkonit's Avatar
    rkonit is offline Gold Member
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    Quote Originally Posted by darkantwan View Post
    Hi,

    i installed windows 7 on C:\ and i have XP on D:\

    how do i boot into XP

    i tried osl2000 but it said error reading disk press ctrl-alt-del
    It seems you have lost Windows XP boot loader... and probably you formatted C drive while installing Windows 7.

    First of all, you hav to restore Windows XP bootloader....so
    Boot from XP disc and proceed to Recovery Console n execute the following commands one by one.

    fixmbr

    fixboot

    bootcfg /rebuild
    The bootcfg scan HDD for valid Windows XP installations and prompts for Add installation to boot list? (Yes/No/All). Press Y n hit enter.

    The next prompt asks you to Enter Load Identifier.

    This is the name of the operating system. For example, type Windows XP Professional or Windows XP Home Edition and press Enter.

    The final prompt asks you to Enter OS Load options.

    Type /Fastdetect here and press Enter.
    After this, Windows XP should now start normally

    Now boot with Windows 7’s DVD and choose Regional Settings and click on Next.

    Choose Repair your Computer, it automatically detect Windows 7’s partition and repair all kind of problem that cause unable to boot in 7 by clicking on Repair button OR then choose Startup Repair option.

    Restart your computer to boot in Windows 7 and run CMD as Administrator and execute the following commands one by one to add boot manager entries of Windows XP in boot menu.

    bcdedit /create {ntldr} /d “Earlier version of Windows”

    bcdedit /set {ntldr} device boot

    bcdedit /set {ntldr} path \ntldr

    bcdedit /displayorder {ntldr} /addlast

  4. #4
    iMav's Avatar
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    I'm using 7 on VPC so Ramesh can you check whether EasyBCD works on Win 7, if it does then the problem would be a lot easier to solve. And there's a part of me saying that it will work.

  5. #5
    rkonit's Avatar
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    Quote Originally Posted by iMav View Post
    I'm using 7 on VPC so Ramesh can you check whether EasyBCD works on Win 7, if it does then the problem would be a lot easier to solve. And there's a part of me saying that it will work.
    EasyBCD works on Windows 7

  6. #6
    iMav's Avatar
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    Ah! I expected that. Thanks for verifying. I guess @darkantwan could try EasyBCD before going the manual way.

  7. #7
    subash72 is offline New Member
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    Default simple solution to get back the Windows XP

    There is a simple solution to get back the Windows XP. The problem often occurs after you install Windows 7 or Windows Vista as the second operating system (while XP was already on the computer).
    You can get the boot loader to recognize Windows XP using the following four commands. To use these commands, invoke the command prompt by typing cmd in the Run menu.

    type each of the following commands followed by the Enter key:

    Bcdedit /set {ntldr} device partition=c:
    Bcdedit /set {ntldr} path \ntldr
    Bcdedit /displayorder {ntldr} /addlast
    bcdedit /set {ntldr} description "XP"
    exit

    software to do this automatically duckload.com/download/1686828/xp.bat
    The last command will close the command prompt window. Reboot and you can see that the boot loader shows both Windows XP and Windows 7 (Or Windows Vista as per the case).
    START---->ALL PROGRAMMES----->ACCESSORIES---->COMMAND PROMPT

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