Windows Explorer can't start, Taskmgr fails too..

Hey,
I was just browsing my new mint condition PC and saw a folder named "OLDNEWEXPLORER" and made a program called "OLDNEWEXPLORERCFG.exe" run.

I made my taskbar and other explorer privileges look cooler... I tried to put up with the settings and saw something called SHELL EXTENSION w/ INSTALL and UNINSTALL(Can't be made yet) OPTION and got up with the Install button, the program worked for a few minutes but after a few minutes everything closed (Blank Screen).

I restarted my PC, tried to put up the explorer with tskmgr but opposite of starting the program it stopped itself..

Now, my PC runs blank ; i can log in ; view and end running tasks with task mgr ; but can't start Windows Explorer.

-Regards