I don't know if it's just me, but for a few days now my PC doesn't appear to be custom scanning (specifically USB pen drives attached to the port). The support team was very helpful (thanks, Amal) but, despite loading the most recent version, no improvement has occurred. All I get is a claim of 100% success but with a completely random number of files (between 0 and 3, usually) specified as having been checked. Since there are usually several hundred files on the drive this doesn't inspire the peace of mind we're all paying for... Anybody else experiencing this?
When scanning folders with text files and some other file types, I have the same problem. Like you, I first noticed this problem when trying to scan a pen drive.
And history doesn't seem to be working either. (I tried to use it to find out what was scanned.)