Re-enable Task Manager
- Open regedit
- Go to key.
YOUR_USER_HASH
is the key related to your own login. Usually look like S-1-1-11-111111111-1111111111-11111111-111111
[HKEY_USERS\YOUR_USER_HASH\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System]
- Edit the name
DisableTaskMgr
to 0.