install / uninstall

Since a few days cis reports that the firewall ist not functioning correctly. Wenn I run diagnostics I get the message that it could not repair the problems. When I try to uninstall CIS it say it can not access CFT.exe in the installation path. I should run it from C:\windows\system32 but ther is no such file.
I reinstalled and had the same problems.
Can somebody help?
Tnanks in advance

Please follow the steps I’ve outlined here. Just skip over any steps that aren’t applicable and let us know how it goes.