Open your registry and find the key below.
There should be a value named 'SchedulingAgent' which is set to equal 'mstask.exe', this is the entry that loads the Task Scheduler. Delete this value to stop the task manager loading again.
Note: Remember to backup your registry before deleting any values!
Key:[HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\RunServices]
Value Name: SchedulingAgent
Data Type: REG_SZ
Data:mstask.exe
