humble, not sure if the newer compaq/HP pc's are able to do this or not, but tip I got from ZD tv ( pc tv show on the Dish )
was to dump and format the hard drive, erasing all the hybernation files/ recover files etc that are partioned on the D drive for system recovery......
basically remove everything from it that tells it it is a compaq, then install a full copy of an Os and treat the pc as a clone.......
did this to my Mom's athlon compaq pc, and she never had any other troubles from then on........
just a thought......only thing is you will void your warranty if you do this........
edited: hmm better add this, I went and got the MB drivers from the manufacturer of the MB, and for the sound card, vid card and flashed the Bios with the most updated version, the OS when installed did as it normally does for Windows updates......
The PC doesn't know it is a compaq now, repeat though, if you do this u void your warranty if you have any left, and it may not work with today's newer systems by HP/compaq
another thing, I have noticed alot of the E machines, comapq, HP, systemax computers that ship with OEM OS of winXP are setup as FAT32 file structure