Need help with Registry Cleaning Problem Definitions

[CharliAnn]

I'm somewhat technical, however when it comes to Registry cleaning, I'm Extremely cautious.

I have a questions about the Definitions of the Problems that CCleaner recommends I remove: For example:

Invalid Firewall Rule, ActiveX/COM issues, Installer Reference Issue and Missing MUI Reference.

Can someone explain to me what these specifically mean before I go cleaning out the Registry and then having a nightmare trying to repair my system.

I usually have 2 computers running, but MS Windows was "kind" enough to crash my laptop with one of their Updates and it is COMPLETELY Unbootable, so I only have 1 computer left to work with.

Please help!  Thank you.

CharliAnn

 

[nukecad]

We recommend that you don't regularly use the (any)  Registry Cleaner with Windows 10, only use it if you have a specific problem.
Windows 10 changes the registry often which can give false results.

For the official Piriform advice on using the Registry Cleaner see this: https://community.ccleaner.com/topic/59952-i-get-a-registry-error-on-ccleaner-on-windows-10-i-have-scanned-5-times/?tab=comments#comment-326804

Here is Microsofts stance on using any Registry Cleaner:
https://support.microsoft.com/en-gb/help/2563254/microsoft-support-policy-for-the-use-of-registry-cleaning-utilities