Blank Windows Screen or ISAPNP.sys Hang = A Zero Bytes .Sys Driver

I had one hell of a mystery on my hands the other day.  A client called me and said she had a blank screen every-time she booted up her Windows XP computer.  I was pretty busy, so I told her I’d pick it up and work on it over the weekend.  I just figured it was a bad vid card or a corrupted Windows XP install.

Here are the things I tried:

  1. Full Scans using my UBCD4WIN…nothin found…
  2. I tried to load safe-mode but it hung on isapnp.sys everytime.
  3. I ran checkdisk /r
  4. I did an in-place Windows XP repair

….nothing would work.

As I was doing a visual check for standard Windows XP drivers I discovered there was a randomly named zero kb .sys file in c:\windows\system32\drivers.  I simply deleted the file and the PC booted up completely normal.

I just wanted to put this out there because it looks like it’s something new.  I’m not sure if it affects other versions of Windows or not.

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