I run Windows XP and IE 7.0 beta 2. Recently I've encountered problems with downloading files (can't download any, no matter what type), I can't right click save or copy, I can't access my internet options, and I can't use my delete key.

I've tried system restoring to two different points, I've run McAfee scan, SpyBot, AdAware, and CCleaner. The only thing that has turned up has been registry values that need deleting. Any suggestions?