They're rather insignificant in size but if you want to delete them you can. Be careful not to delete anything else or you can destroy your operating system.
Good day. My PC optimisation programs, CCleaner and Easy Cleaner does not take away obsolete software folders in the registry when I run them. I have accumulated quite a numbr of these folders in the registry, programs which I had already uninstalled lomg ago. Can I just go into the registry and delete them?