Ok..So for the last week I have been having the same problem with my computer. My computer has started to get jerky, Whenever i am on the internet, about every 10 seconds my mouse pointer will get jerky when i move it..or if im LISTENING to music, the song will start to get choppy..the same when im watching a VIDEO..Mainly I notice it the most when I play Counterstrike online..The game will run SMOOTH and then about every ten seconds it will stutter about 4 times..Ive done almost everything i can think of so far to find out whats wrong with my computer..Ive run various different Spyware,adware, and virus programs to fix it..but nothing has worked..Tonight I finally decided to do a full system recovery in hopes that it would fix the problem..but it did not..So i am forced to believe it is a problem with some hardware on the comp but i have no clue on how to find out which piece it could be..or if that is even the problem..IF YOU HAVE ANY CLUE ON WHATS WRONG PLEASE TELL ME!!!  :-? :-? :-? :-? :-?Anu clues on the components of the machine, how old, the make and WATTAGE of the power supply, etc?I would start off by taking out all the add-on cards and cleaning the
slot connectors with a clean pencil eraser rubbing gently to remove
tarnish buildup.

Download and run Memtest.

http://www.memtest86.com/


Download and run the hard drive diagnostic
test from your hard drive manufacturer.

http://pcsupport.about.com/od/diagnosticsoftware/tp/tophddiag.htm
ok..
it has

Hp Pavillion
AMD Athlon(tm) XP 2800+
2.08 Ghz
512 mb ram
Radeon 9800 PRO series
Samsung CD-R/RW SW-248F
Rosewill 250 watt power supply
Audigy 2 Sound Card
Custom Case

The computer itself is about 3 or 4 years old...but i have only had this problem for a week...When did you add the video card, and what's up with the power supply? How old? 250w seems rather underpowered.

What happened prior to the problem? What virus/spywar eprotection is being used? How much free hard drive space?

Try the online scanner at www.trendmicro.com just for grins as well.Oh well some buddies from my dads work said that it was overheating..and that i should clean it..so when i opened the case..there was dust everywhere..i gave it a clean and it worked..back to normal..appreciae all the help anyways =)That PSU is still suspect...expect to be purchasing one in the near future...

Don't buy the cheap ones ...you can see why.