CCLeaner – clean, Tweak, Delete traces
.Over 140 million downloads!!!
CCleaner is a freeware system optimization and privacy tool. It removes unused files from your system – allowing Windows to run faster and freeing up valuable hard disk space. It also cleans traces of your online activities such as your Internet history. But the best part is that it’s fast (normally taking less than a second to run) and contains NO Spyware or Adware! 
+ Tweak n Cleane your Windows Registry.
I will show you my Technique of using it,
.This my Technique of useing CCLeaner :
1st Close all Applications > Messenger, Firefox, Games, movie.. etc.
2nd Run CCleaner, use these SETTINGS & steps i written in th IMAGE.
3rd, now after cleaned everything dont run anything & CLICK on Registry on CCLeaner > SCAN for issues >
FIX ALL > it will ask you to take BACKUP of registry Click NO.
DONE
