|"I do not know any thing about how to format my computer, I would like to know the steps for cleaning up my computer"|
Formatting is not cleaning, it basically means erasing. You will lose EVERYTHING on the hard drive...it will be completely wiped clean & you will have to start from scratch. You'll have to reinstall Windows, all the device drivers, all the Windows updates, all your additional software such as anti-vrus, firewall, office/word processing programs, games etc. It can take several hours, probably longer since you're a 'newbie'. Is that really what you wanna do?
The fact that you wrote "I do not know any thing about how to format" leads me to believe that you don't know anything about reinstalling Windows & all that goes with it.
If you're doing something you shouldn't be doing, either stop doing it or learn how to cover your tracks. But as Richard59 pointed out, there's always a record kept somewhere...if not on your PC, then it's on the server. No one is ever 100% secure.