I own a AMD processor with a VIA chipset and am getting jitters when recording or when starting the windows machine .
This is usually due to VIA chipset with AMD processors and there are fixes from the two links listed beneath. The problems seems to stem from the USB in the BIOS being disabled plus there is a file you will need to download and run from one of these web sites.
http://www.via.com.tw/drivers/index.htm
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