AV scans won't run & Firewall not functioning properly

I am experiencing most of the probems listed on this topic page. I will try the solutioins
posted. My firewall is reporting that it is not functioning properly, aND TO RUN A DIAGNOSTIC
… discovers prblems and then prompts to fix them. Could not fixall the errors. Created a report.

Antivirius will not scan , manually or under “run a scan”.
error code 0x00004002.

any suggestions please.

Please give us more details. What version of CIS, what OS, other security software running, etc. Without these it makes it impossible for us to help.