1)   Registry Booster 2
94% of computers have corrupt, unused, and possibly harmful files. Run a FREE registry scan to clean, repair, and optimize your system with the leading and award-winning Registry Booster 2 from Uniblue.

 2)   SpeedOptimizer 3.0.9.5
SpeedOptimizer 3 optimizes your Network & Internet connections. The latest version expands SPO to a suite of tools, designed to optimize and fix problems in your registry, temp. Files folder, and system settings as well.

 3)   RegistryBooster 2
RegistryBooster 2, Uniblue's award-winning registry cleaner, is the easy answer to registry problems. It conducts deep scans of your registry to check for errors and conflicts, then repairs and optimizes the registry to peak performance and stability

 4)   Free Windows Fix 2.1.0.0
The Free Windows Fix is an excellent solution to make your computer fast and stable as never before. With only few clicks you can optimize your PC hard disks, registry and internal settings which directly affects PC perfomance.