Sadeaner is a good tool for cleaning up the PC
cleans registry, cleanup disk, defrag drive
Little System Cleaner is an all in one system cleaner.
Environment Variable Cleaner
V2.0-Unhides Folder/Files,removes malicious scripts from USB Drive
Compact the Windows Registry
Open Source Pinoy Antivirus
AnyCleaner is a powerful tool for cleaning your Windows PC.
DirectX 1.x - 8.x uninstaller/cleaner