Registry has been disabled by Administrator Error

How to troubleshoot regedit and taskmgr disabled by administrator error

This error is caused if the DisableTaskmanager restriction is enabled. To enable Task Manager.
           
Try this methods:

A- For Taskmanager

Run this command either in run or cmd with admin right.
----------------------------------------------------------------------------------------------------------
REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableTaskMgr /t REG_DWORD /d 0 /f

Reboot your system.

B- For registry disabled

Click on Start -> Run  gpedit.msc

 User Configuration -> Administrative Templates -> System

Select Prevent access to registry editing tools

Select Disabled

Click on OK button.

 Try to run Regedit and if required (still blocking yet), restart the computer

                                                                   ==OR==
If problem still exist it means you need to edit registry by given command on cmd with admin right.
-------------------------------------------------------------------------------------------------------------------
REG add HKCU\Software\Microsoft\Windows\CurrentVersion\Policies\System /v DisableRegistryTools /t REG_DWORD /d 0 /f
-------------------------------------------------------------------------------------------------------------------

  I hope your problem will shootout.