[nWo4Life]

I get "Error: Access Denied" / "Error: The process cannot access the file because it is being used by another process"

Error: Access Denied can be caused by numerous things. The most common cause seems to be Google and MSN Desktop. A possible fix is turn off the indexing feature, or to uninstall them. Excluding the download folders from indexing should work.
The best solution is to uninstall Google/MSN Desktop.

WinZIP Quickfind has the same effect as Google/MSN Desktop. It must be disabled.

This is from the FAQ

If I had my Zune program in the background which has ties to the Download section, which this cause it?