For a month now, I have been unable to do the Boot-Time scan. When I load up the definitions and reboot my laptop with the scan enabled, I get a blank screen with the words ‘Avast AntiVirus Loading.’ Nothing happens after a while so I have to reboot it in order for Windows to reload. Prior to this, I would have no problems with this scan.
I have the latest version of the Avast Premium Security program. I have a laptop that is using the latest version of Windows 10.
I believe there have been issues like this for some users
due to the use by Avast of the Windows Recovery Environment
with Boot-time scans.
I use AVG so can’t speak definitively about options in Avast,
but you might try looking in the advanced settings in the
GEEK:AREA for an option to disable that feature.
In AVG it is
“Boot-Tine Scan: Run in Windows Recovery Environment (restart needed)”