Can't install downloaded CR XI Developer from SAP - file corrupt?

The file is .zip file download that will not install. It gives me an error:

Windows cannot access the specified device, path, or file. You may not have the appropriate permissions to access the item.

I'm running as an domain admin on a w2k3 server... I have permission, I even double checked. Is this file corrupt?

Item is: 7008028-1T2 Crystal Reports 11 Dev Win NUL 1-2 Units