When CCleaner fixes the registry problem by deleting the registry key, Norton 360 "Help" does not work. When I restored the registry key, Norton 360 "Help" does work.
it doesn't, CCleaner Identifies reg entries it cannot identify the program for. You need to decide whether the reg entry ought to be deleted.
Most Antivirus/Antimalware/Security programs will have MULTIPLE entries listed in CCleaner's Reg scan. This is because the makers of the Security product don't have their programs identified in their reg entries to make it harder for them to be disabled by malware.
I hope you were wise and made a backup of the reg entries before you removed them. else you WILL have to re install Norton.
The Best practice for reg entries is laid out clearly in my signature
Also do it in little chunks (a checkmark at a time, at the very most) so you don't have to put too much crap back into the registry when you merge that backup back to the registry
(I wonder how many times I have typed that r word in this forum LOL )
To get around that problem, you can exclude a registry item from being cleaned by first copying the key by going to Start/Run enter "regedit" (without the quotes). Navigate to the reg entry in question, right click on the folder in the left pane, and select "copy key name".
Then go to CCleaner/Options/Exclude/Add Registry, and paste the key name into the window. Make sure you select the right "hive" address in the small box, HKLM in this case, and then delete the hive name from the start of the pasted address in the long window, as this is already set in the small one.
If you do this correctly the "OK" box will become active. Hit OK.