What are some alternatives?
When comparing Sysinternals Suite and Ultimate Windows Tweaker, you can also consider the following products
CCleaner - CCleaner cleans, speeds up and frees up space on business endpoints.
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.
AVG PC TuneUp - Peak performance for your PC. Keeps it going for longer. - More Speed Turbo Mode
Advanced SystemCare - Free optimization software & registry cleaner for Windows 10, 8, 7, Vista and XP. Advanced SystemCare Free to speed up PC, clean registry and repair system in one click.
System Mechanic - System Mechanic uses patented technology to help fix PC errors and restore speed. The software is compatible with multiple versions of Microsoft Windows.