The computer has been slow recently. When I opened the C disk, I was shocked. I used 70G, but I can use 30G. God, Win 10 system doesn't know how to lose weight.

Uninstall all guards, butlers and assistants and their accessories, plug-ins and domestic antivirus software;

Restart the computer;

Download and install CCLEANER and Rubik's Cube;

Restart the computer to enter safe mode;

Use CCLEANER: Delete unnecessary startup items, self-startup services and task plans, cclean and registry garbage;

Clean up the main cc clean and registry garbage with Rubik's cube;

Restart the computer and have a look.