I have been running CIS for a while now with no problems and, with some time on my hands the other day, decided to have a play!!!
I went into the manage configurations and set it to “proactive”.
That was a big mistake as nothing would then run - got an error something like “do not have access to this file or folder” for everything - including CIS itself
I couldn’t even shutdown the PC except by powering off.
In the end, I had to recover the system by reloading from backup (fortunately taken the night before).
So what actually happened and what should I have done before setting “proactive”? I have full admin privs!
BTW I am not planning to change this again in the near future unless I am 100% sure it will not lock everything up again!