Loss of license key aftter cleaning

[nukecad]

If you have messed up the registry and are unable to restore it then you will have to reinstall the affected programme(s) to reset the registry entries.

PS. There is not usually any need to clean the registry if you are using Windows newer than Windows 7.

i get a registry error on ccleaner on windows 10 i have scanned 5 times

Cleaning up the registry may still have merit for our users on Windows 7 and below. The use case for the registry cleaner on Windows 10 is if: You have a specific problem that you are trying to resolve; or You are trying to locate and/or shred leftover registry entries from a specific piece of software that you have uninstalled from your computer When we next have a major UI refresh, the registry cleaner will likely be moving under the Tools menu to reflect that: Regist…

Microsoft recommend that you do not use any registry cleaner:

Microsoft support policy for the use of registry cleaning utilities -...