Ensure that you have the latest VPS update (right click the avast 'a' icon, select, Updating, Update iAVS), open the chest and scan the files in the Infected files section, as certainly one of those MS OFFICE ones was a false positive detection. If any that were previously detected are no longer detected, right click on the file and select Restore, that will send the file back to its original location.
Any others remaining as detected after the scan, let me know and I will tell you how to send them to virustotal for further checking.
