Sudden changes in behavior can usually be traced to some event change, software or hardware. On the software side take note of any new programs (scan for spyware/virus), the hardware side should be obvious.
I have XP professional, 1.3 amd duron, 120 gig hd. All has been well until recently the mouse would freeze sporadically. Would reboot and all would be fine for hours...days. Now when the system has been off for, say overnight, I can boot up and run programs for 5-10 minutes and the mouse freezes. Reboot and system will freeze during post. Try to reboot again and the poor thing just says check video cable and the drive lights flash and it has a strange continuous sort of beeps.
I tried switching the memory modules, watching to see if the fans are working...yes. Should I change the video card? CPU? or could it be the goop between the heat sink and the cpu? Any suggestions would be appreciated. I took the A+ class, but I have very little actual experience so don't make things to complicated!!!!