I recently got a virus and it deleted many of my programs, such as MS Paint and the volume control. When I downloaded replacements for these, different error messages came up such as 'Installer Corrupted' and 'Cannot Recieve File Info'. I thought this was due to windows installer being deleted, so I downloaded a new microsoft one and there didn't seem to be any problems when setting this up. But the downloads still don't work. I only have this problem with programs. How can I fix this? Thanks.