Let them fix it. It's much cheaper to let HP fix it.
I have an Hp 522n running XP home, 1.8 gig,50g hard drive.
It ran fine for 8 months then developed some hanging problems on standby.
That turned into some very slow shut down problems over the course of a week or so, then it shut down and now won't reboot properly.
It would power up and the fan works, but it would not acknowledge either the keyboard (after a split second 1 time lights flash), nor the mouse. And naturally, not the C:\ drive to read the boot ini.
I manged to hit control\alt\delete at precicely the right moment one time and got it booted. It ran fine, restarted several times Ok, then upon shut down, would not reboot.
Next time I tried the cont\alt\delete trick it went into HP's great full system recovery, rolling it back to factory specs. But still no boot.
Contr\Alt\delete again and this time I even managed to get into the BIOS and changed the boot order to DVD-CDROM\A;|\C:\ so I can boot up from Norton's home made emergency boot dis now. Otherwise this computer is performing flawlessly.
Oh, one more thing...now although I could reinstall Norton's Anti Virus, it won't even touch the Norton Utility Disc to install those programs. (I am not sure but this may have something to do with the boot files being on that disc?)
Any answers or help to this boot up situation would sure be appreciated!