Hi GG
My name is Andre Da Costa; an Independent Consultant, Windows Insider MVP and Windows & Devices for IT MVP. I'm here to help you with your problem.
Can you try initiating the scan in Safe Mode to see if it completes?
Press Windows key + R
Type: msconfig
Hit Enter
Click the Boot tab
Check 'Safe Boot'
Click Apply then OK
Sign in then try then try running the scan again.
If that does not work, try using the ESET offline scanner instead to scan the system:
https://www.groovypost.com/howto/clean-virus-in...
Information in the above link is sourced from a trusted Microsoft MVP blog.