The file location looks like it could be a false positive caused by Panda anti-virus unencrypted virus signature files being detected as viruses.
Did you install PCstop, as it would appear it includes panda's unencrypted signatures?
There seems to be little history for PCstop on google, perhaps trying to associate itself with PcPitStop. So long as you have this installed you are going to get these detections and I thing excluding the AV folders contents would be leaving yourself vulnerable.
Not all files can be repaired (either by the VRDB or avast virus cleaner), because the entire content of the file is malware, so it is either move to chest or delete, move to the chest being the best option (first do no harm). When a file is in the chest it can't do any harm and you can investigate the infected warning.
The VRDB only protects certain files, .exe, dll and other system files, it doesn't protect data files or all files, it is not a back-up program, so there are going to be many occasions where repair won't be an option.
Only true virus infection can be repaired, e.g. when a virus infects a file it adds a small part to it, provided that file is one that avast's VRDB would monitor and you have run the VRDB, then it may be possible to repair the file to its uninfected state.
However, for the most part so called viruses, trojans (adware/spyware/malware, etc.) can't be repaired because the complete content of the file is malicious.
