i am having the same problem.
i just downloaded 2.5 gigs worth of games which had no problem running on xp
but with vista i get same error as you wont even extract. if anyone can help
pls post it here.

"Zac Toliver" wrote:

> I am running Windows Vista Home Premium. I have the most recent updates
> installed. I tried downloading and installing the demo for the new game Call
> Of Duty 4. When I try to extract the application, it gives me this error
> saying "An unexpected error is preventing the operation." Can someone help me?