Can not complete a scan? Program locks up?

Product version: 5.0.1.163652.1142
VSDV:6890

When I try to run a virus scan it will run for about 35 mins and then lock up. (stop) I reloaded the program and tried again with the same results?

I have scanned the computer with Hitman Pro and Malewarebytes, both reported no threats found.

Comodo Internet Security is showing a yellow sheild: You have not completed a full scan yet.
I have run a Diagnostics check and it finds no problems.

Any ideas on what I should do? ???

Is it similar to this?
https://forums.comodo.com/format-verified-issue-reports-cis/comodo-av-stalls-during-scanning-284-t63244.0.html

Comodo need reports to fix it.

Mark