Will not scan downloaded file.

Will not scan download file after updating Comodo antivirus from version 8.4.0.5165 to 10.0.1.6209. I get the error message - Cannot start virus checking program. The system cannot find the file specified. Worked fine until the update.

There has been issues updating from 8.4 to v10. You should export your config and perform a clean uninstall/install follow this guide here.