Yes. Unlocker (take care of taking no action with the file, I mean, not to delete it).
I always forget I have Unlocker! I closed Outlook, went to the outlook.pst file and clicked Unlocker. Says nothing is locking it, no handlers found. So, I got out of that, choosing No Action. Then used my right click/Scan with Avast on just the outlook.pst file. Scanned it no problem.
I know almost nothing about this stuff, but I have two thoughts.
1. Is the scan Avast does from the menu on one file different than the scan it does at night while doing a full scan?
2. I leave Outlook open all the time. And Avast never used to have a problem scanning it while open until this last update. Should it matter to Avast if Outlook is running?
Thanks for any input!