Media centre nightmare please help.

[Firestarter666]

I have an issue with a media centre that I built.
Thermaltake tenor case
AMD Athlon San Diego 4000+
Thermaltake blue orb cooler
Thermaltake pure power 500W
2Gb Crucial DDR400 Ram
Asus A8V deluxe
Hauppage Nova T DVB3
WD 300Gb caviar

Everything works a treat and I was well happy until now. For some reason while playing music it keeps getting stuck like a needle jumping on a record and then carries on. I have turned off any auto updates and other programs from running in the background in case this is causing the fault but it keeps doing it. I have about 120Gb of music saved at Windows lossless but cannot enjoy it because of the intermittent jumping of tracks. I have defragged and gone over all that I can think off. Has anyone else had this problem or could you think of why it might be happening?

Any help will be greatly appreciated.

 

[FatRakoon]

Drivers up to date?
Spyware / Virus checks up to date and not using that sodding Norton junk.
HD checking out ok?

 

[Firestarter666]

Yea all the drivers are up to date. Norton (no way) came with the mobo but I refuse to use it.
Hd is fine with no errors and has been defragged.
Been trying without connection to internet on and it seems to be ok. I had turned auto updates off anyway but maybe it is searching for something else like the tv guide??