It sounds a lot like the program that is playing the music is having problems keeping the flow of music due to not getting the info from your HD or where ever fast enough.

This can be due to something as simple as your HD being really badly fragged which can be easily fixed by defragging it (should do that anyway once you have done a reinstall of o/s)

IF it isn’t that it could be due to older drivers, running out of RAM (do you have anything else running when trying to play the music?).

I think it is probably something to do with the fragmentation of the HDD or the memory though and would suggest starting with those. Might also be worth loking at a better program to play the music as that can help… (Update all your drivers also as the ones windows install with installation are all out of date)

Kick it!

update ur sound drivers. Perhaps somehing running in the background is using the sound too, for example msn, that sumtimes makes my music tracks skips