GilV37,
We are not done.
The infection you were initially confronted with also brought with it a new malware variant that affects
Microsoft Security Essenials and/or
Windows Defender. It creates symbolic links to their folders and files, which, in turn, affects path-name resolution. In plain English means "can't get there from here".
This infection is very recent, so we had no idea what it was, or, what was involved. Taking care of this variant of ZeroAccess should also restore the ability to download files.
For now, please do not engage in any other repairs, as they will not help matters.
Need to take a good look at the last report you provided which identifies symbolic links. There are quite a few of them, but, it appears that Microsoft Security Essentials is not involved.
More than likely, will not get back to you until tomorrow.
Thank you for your patience.