I had the same problem with a previous version. The solution I found was to download Malwarebytes and run a scan with that and all was well after that, after it removed some viruses. Depending on how your computer is feeling it might be best to uninstall McAfee first. Also remember to uninstall Malwarebytes after using as McAfee 2010 doesn't like Malwarebytes(but previous versions did).
Hope this helps