XPx64 and XPx86 on same PC

Discussion in 'Windows 64 Bit' started by Martin G, Sep 25, 2007.

  1. Martin G

    Martin G Guest

    Hi all

    We have one PC at work with x64 on it, however due to lack of drivers our
    IT man has put XP pro on it so it dual boots between x64 and x86, both
    versions of XP have been installed into the same partition and from studying
    this newsgroup I get the impression this could cause some problems. Can
    someone confirm this? or is this a supported configuration ?

    Last week I tried to boot into x64 and could not log in as the IT man has
    not set up the Domain so re-booted into plain XP, now when trying to use
    Internet explorer (which worked fine) I am told that the .exe file in
    Program Files/Internet Explorer is not a Win32 application, can this have
    been caused by the attempt to run x64 ?

    Thanks for any help, as our IT man is currently not available.

    Martin G, Sep 25, 2007
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  2. Operating systems should always be installed in separate partitions. The
    older operating system should be installed first unless you know how to
    configure the boot order.

    x64 XP uses WINDOWS\system32 and Program Files for 64-bit files.
    32-bit components are in WINDOWS\SysWOW64 and Program Files (x86).

    32-bit XP uses WINDOWS\system32 and Program Files for 32-bit files, so if
    both versions of XP are on the same partition there will be confusion.

    Dominic Payer, Sep 25, 2007
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  3. This is absolutely NOT a supported configuration. And a really bad idea. you
    need to wipe that partition and start over. If you're going to dual boot,
    use two partitions. Install 32-bit XP first, then install XP x64. See my
    blog posts on multi-booting for details.
    Charlie Russel - MVP, Sep 25, 2007
  4. Martin G

    Martin G Guest

    Hi all

    After further investigation it appears that the IT man has installed XP into
    a folder other than the default so as not to overwrite the x64 installation.
    I have passed on your advise and it looks like the current workaround is to
    remove the dual boot option till he rebuilds the PC.


    Martin G, Sep 26, 2007
  5. Even in a non-default folder it's a BAD IDEA. There are other folders
    involved, and the view of the file system is different between 64-bit and
    32-bit. The system needs a wipe and rebuild.
    Charlie Russel - MVP, Sep 26, 2007
  6. I agree! Somewhere in the NT4 documentation, if I'm correct, this method was
    listed as a (bad) option - I have never seen it mentioned again. Not

    Tony. . .
    Tony Sperling, Sep 27, 2007
  7. Martin G

    jorgen Guest

    Do you have some documentation on what difference there should be?
    jorgen, Sep 28, 2007
  8. amongst other things, 32bit applications don't see the same
    %windir%\system32 as 64 bit. And application installation directories are
    different (32bit installs to "program files", 64bit does to - but installs
    32bit apps to program files (x86) creating issues with 32bit and 64bit code
    residing in the same putative directory.
    Charlie Russel - MVP, Sep 28, 2007
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