Hi there Muhammad Daniyal
Thanks for using QandA platform
Registry cleaners like CCleaner can sometimes cause issues if they remove critical registry entries. someytimes they can inadvertently delete important files or settings,making system crash.
In your case, using a registry cleaner might have got to the issues you experienced and other system functions like the Windows search bar and sign-out option. yes DISM
and sfc
can help repair system files, they might not fix problems caused by deleted registry keys.
in future i suggest, it's often better to avoid using registry cleaners.
If this helps kindly accept the answer thanks much.