I know this is not the place to this but you guy's are gods with puters

.
When I am D/L some music and lets say that it might take a couple of hours to D/L
so I walk away for a while, I come back, and tne puter has shut its self down and I lose my D/L . it has never done this before. I have win xp home sp2 80gig, 512meg of ram
thanks for any help :~).
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