You can try the following:
Download PsExec
extract it to a directory.
- Right-click
cmd
"Run as Administrator". cd
to the folder where you extractedPSExec
- Copy the command
"psexec.exe -i -s %windir%\system32\mmc.exe /s taskschd.msc"
and paste in thecmd
window, press enter. - In the Task Scheduler Library, Right click the task and click Disable.