No access to files

I've found that even as Admin there is a lot to Vista with No Access. I
just downloaded the 64bit version RC1, the download - like others was saved
to the virtualized directory. The download showed complete, I closed the
downloader but the file remains in the virtualized directory - to which I
don't have access. I even activated the adminsitrator account, logged on,
searched, no .iso files. I tried to navigate to the virtualized folder
withing Temporary Internet files, no access. I can see how this would be a
bad thing. Right now I would like to get to the file I just downloaded.