I tried today, as many times in the past, to open inside my Win10 PC a recorded video file (.ts) coming from a PVR unit.
This time, however, the file seems to be broken (5GB size but just 1 minute reported length), but before throwing it away I wanted to try opening/converting it with some other software.
The reason for my posting here is that when I loaded the file with a video player (Media Player Classic) Avast issued an alarm saying something like:
videofile.ts has been blocked because it was infected with IDP.HELU.Autolt10.
After that not only the TS file was moved to the virus trash can but also the Media Player Classic EXE file disappeared from its program folder. Moreover, I was not able to find it inside the trash can and I also wasn't able to restore it from a backup because any attempt to do that was blocked by an "access denied" warning from the OS, despite me belonging to the system Administrators group.
The error went away after shutting down and restarting the system.
So, coming finally to my Avast-related questions:
1. does it make sense that a video file recorded from a free SAT channel by a PVR (not connected to the Internet) could contain a virus?
2. is it normal for the EXE file to disappear and to remain un-restorable until the system is rebooted?
3. can it be safe and useful to run some other party scanners (such as KVRT or tdskiller tools) while Avast antivirus is running?
Thanks in advance for any help.