New update from Acronis is being blocked by BitDefender as malicious.
Advanced Threat Defense (ATD) then goes after 20 applications. On reboot, the boot disk is disabled, requiring a Startup Repair.
Update file is first on this list, for PC: https://www.acronis.com/en-us/support/updates/
I submitted the file to BitDefender
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Critical issue in BitDefender:
BSoD: