FULL-DISKfighter is Hard Disk optimizer tool that cleans out Junk files and unnecessary files from your Hard Disk.  FULL-DISKfighter organizes and defrags the rest of the files so that when your computer accesses files, it is faster and easier. In addition, you can easily get an overview of Duplicated or Large files  that enables you to organize your files such as pictures in folders.  Please remember don't delete files if you don’t know what they are as once they are deleted they are gone, so always have a Back-Up. The Quick Scan feature in FULL-DISKfighter will not delete files that are important in your system.

SLOW-PCfighter is a program the cleans your Windows Registry and a Start-Up Manager.
A PC´s registry needs to be cleaned once in a while as it gets cluttered with various entries collected overtime such as installing and uninstalling programs and many other behaviors.
Once you have run SLOW-PCfighter it will clean your PC´s registry and will improve your computers performance and start-up process aimes to be faster.

Please note that FULL-DISKfighter and SLOW-PCfighter does NOT do the same thing and one of the programs does not substitute the other, but based on your issue you may need either one or both