I don't know what to do and need to stay protected with my antivirus. Managed to get that running by starting the Avast service but now it says: ' The stub cannot run installer/updater executable'. I have already verified that my user account has administrator access. When I abort the uninstall, it says ' You do not have sufficient access to uninstall Avast'. I have also tried to uninstall Avast (in hopes of reinstalling it), but the uninstall hangs near the 99% mark and will not progress. I have tried disabling and re-enabling Avast, but it doesn't help.
Since then, Avast antivirus reports that ' You are unprotected'. Recently my computer updated to Windows 10 October Update (2018).