i haven't done any editing on a windows machine in years and i've never used Sony Vegas, so i'm not familiar with any specifics...but yer machine seems more than capable of handling the task...shuoldn't be a codec issue as i would assume Vegas installs any necessary codec packs when installing the program suite, and even then yer comp shouldn't be shutting down just cuz of a codec issue
if none of our Vegas users here chime in, ya might try looking/posting over at the Sony Vegas subforum at creativecow...might find some helpful info there:
http://forums.creativecow.net/sonyvegas
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