Ccleaner works perfectly fine. It clears out a LOT more junk than the inbuilt Disk Cleanup
, I tell people this time and time again - some still dont listen

, if you have to download and install (the latest versions auto update) LOOK at what you are clicking, ALWAYS select Customize as the 2nd window after that try's to install some sort of Crap like a VPN, cCleaner browser , or Avast (if using Std Windows AV) The current offering is a pop up windw offering to upgrade to a paid version, simply click "No Thankyou" and its gone.
.
Bookmarks