How to completely clean my PC?

I did a system restore and a lot of unwanted programs have been deleted. I know that there’s still garbage files left behind from those unwanted programs. What’s the best way to make sure that all those garbage are completely gone from my PC?

Hi, I just want to get rid of whatever is slowing down load time. It seems to take a little longer to do very simple tasks than before. I don’t go to any BS sites or anything. Someone said that when you install something then decide to uninstall it, some things may get left behind and after a while it takes longer to search through left over files just to do very simple things. Thanks for any help!

Whats a really good FREE effective Registry Cleaner, because I do alot of dowloading and uninstalling and alot of registry cleaners are left behind

I needs to be safe and not delete anything important on my computer, and I need it to delete the registry cleaners of the uninstalled programs

I use CCleaner but it ain’t getting all of the uninstalled programs registrys