CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
Autoruns - See what programs are configured to startup automatically when your system boots and you login.
Wise Registry Cleaner - Registry Cleaner and Optimizer.
Glary Utilities - The No. 1 Free, Powerful and All-in-one utility for cleaning your PC
BleachBit - When your computer is getting full, BleachBit quickly frees disk space.
Wise Care 365 - Wise Care 365 is a bundle of important registry, disk, and other system utilities for your PC.