Task Manager Not Opening [Solved]

1. Open Notepad.
2. Copy The Following Notepad.

Windows Registry Editor Version 5.00
[-HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe]

3. Save File As TaskManager.reg.
4. Close Notepad.
5. Open TaskManager.reg
6. Then Click Yes To Add Information To Registry.