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System32\DRIVERS\pci.sys missing or corrupt

Discussion in 'Windows XP' started by 4elementsrule, Jun 18, 2011.

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  1. 4elementsrule

    4elementsrule Thread Starter

    Aug 26, 2007
    Hi everyone,
    I got the following message: System32\DRIVERS\pci.sys missing or corrupt. It seems unlikely to me that the problem has anything to do with anything extra hardware I've installed since the only thing I ever use is an external HD which hasn't even been connected in months. In any case, I haven't any idea how to fix this. Safe mode, and every single other option that comes up after an "unexpected shutdown" doesn't work. It may load a few files but then stops and does the "System32\DRIVERS\pci.sys missing or corrupt."

    I do have the CD's that came with it. I haven't done the complete system reinstallation because I have some files that I'd really prefer not to lose. Is there any hope?

    Thank you for any help you can offer!

  2. Jack Hackett

    Jack Hackett

    Nov 19, 2006
    Boot from your XP installation CD
    when the Setup screen appears select the second option by pressing R to enter the Recovery Console
    once you have selected your Windows installation and logged in (using a password if you have one set) type these commands in (pressing enter key after each line)

    Type MAP to determine the drive letter assigned to the CD-ROM. in this example I have used the letter D, yours maybe different but MAP will tell you

    Type expand D:\i386\pci.sy_ c:\Windows\System32\drivers /y

    You should receive a message that says:
    1 file(s) expanded.

    Type exit
    now reboot.

    note: the above is off the top of my head, but Im pretty sure the command is correct
  3. 4elementsrule

    4elementsrule Thread Starter

    Aug 26, 2007
    Thank you soo much!

    My friend had a go last night, and now when it turns on, it asks which OS I want. It shows me three versions, Microsoft Windows XP Home Edition, XP Home Edition 1, and XP Home Edition 2. That's not good having three is it?

    :( Now it's got another problem:

    System32\DRIVERS\isapnp.sys missing or corrupt

    Do I do the same thing as you suggested but use the file name of this problem? And I have a bad feeling I'm going to have to do this for each drive file again.
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