I'm running AVG Free on Win7 64bit. In the last four days on booting up AVG has thrown up a "Threat Detection" indicating a virus "Win32/PolyCrypt". On clicking on "Move to vault" it appears to be doing something and then comes up with the message "the file does not exist or is inaccessible". Later boots also bring up the same message with the same result. I did see one comment that this is a false positive and that AVG were dealing with it. However, I cannot find the file or delete it. Has anyone else had this warning and is there a solution?
Buteman - I did as you suggested and have run a full scan with nothing being found. I have had the same result from both AVG and SuperAntiSpyware. There's either nothing there or it is evading the scans. Thanks for your reply.
Just to tie up the loose ends. I uninstalled AVG Free, left it 24 hours and then downloaded and installed the latest version. The virus warning did not come up and has not done so since. Problem solved