Long Path Eraser Free fixes this problem by scanning every folder on your computer and then checking if it's corrupted. It does this by running a series of tests, which look at every folder's file extension, size and location. Once it has found corrupted files, it'll then inform you of its findings, giving you the ability to either clean this folder or repair it manually. Cleaning your folder manually is a risky thing to do as you might remove important data from your system which will break your PC completely if you attempt to go about it.
The good news is that Long Path Eraser Free has an advanced repair utility which allows you to fix the files without having to get into the guts of your system. You can use this utility by clicking on the "Start" button > "Run" and then type "regedit". This will open a new dialog box with all the settings that you need to modify; just make sure you know what you want to change. Click OK to apply the changes, and then restart your computer to complete the changes. If your computer is running slower after using this program, then you need to increase the values of your various file extensions.