Restore the original task manager after replacing it with the Sysinternals process explorer

Question

After replacing the default Windows task manager with Sysinternals’ process explorer via the Options → Replace task manager menu, how do you undo that action, i.e. restore the original task manager? I’ve already tried clicking that menu again, but it doesn’t do anything.

Answer 1

Delete the HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe registry key.

In cmd, you can accomplish this by running reg delete "HKLM\SOFTWARE\Microsoft\Windows NT\CurrentVersion\Image File Execution Options\taskmgr.exe".