Hey guys this is a wierd one for you, im Running Vista SP1, and im having problem's running video flash programs full screen such as bbc iplayer in which the audio crackles, but if i change resolution down to 800x600 it seems to reduce it by 95% and in a couple of games (Gears of war) which the sound also crackles on certain maps.

I have reloaded the drivers, have the latest drivers and MS updates.

any ideas?

How much RAM do you have and what kind of hard-disk? Also, what graphics card?

I have 4GB Ram, Nvidea 8600GS and SATA2 350 GB Disk.