For registry fix “Restrict Certain Users from Using Programs on Your PC,” you’ll need to:
Backup your system and its important files before editing your registry.
Now, open your registry. You can open your registry by using the Registry Editor (REGEDIT.exe), which is a program automatically included with most Windows operating systems. The Registry Editor lets you view, edit, and search data within the your system’s registry. You can launch your Registry Editor many ways, and the easiest way to is to click the “Start” button, select “Run,” and type “regedit” inthe “Open” box (click here for a sample image of Registry Editor and instructions on how to use Registry Editor).
