As with any software, one should ensure they download software from a reputable site. I have CCleaner and have never had a problem.
You don't need a special program, it is built in to Windows and is now completely automatic. In Windows 10 it is called Storage Sense:On my Mac I occasionally use a program called Onyx, which basically clean things ups and removes crud from your computer. Is there anything like that for windows?
I never knew about that feature. THANKS! I just found it and turned it on. I don't understand why a feature like that isn't turned on as the default status.You don't need a special program, it is built in to Windows and is now completely automatic. In Windows 10 it is called Storage Sense:
What is Storage Sense and How to Enable it on Windows 10
In older versions you simply go to File Explorer, right-click on a hard disk, and click Properties, then click the Disk Clean-up button.
There are people selling programs that do more aggressive cleaning and also tinker with the registry but why risk it when it gains you nothing and risks everything? I run machines for a minimum lifetime of 10 years and never use those cleaner programs. The machines run as fast today as when they were new.