Task Manager Problem

[PcNdm]

My task manager only opens for a second while blank and closes, i have tried download anti virus softwares such as Norton and Malwarebytes and none have fixed the problem. Plz help!!

 

[Trouble]

Go to
C:\Windows\System32
Find
Cmd.exe (if you are hiding file extensions of known types then it might just say "cmd" and not "cmd.exe")
Right click it and choose run as administrator
At the admin command prompt type
net user JohnSmith /add
hit enter
then type
net localgroup administrators JohnSmith /add
hit enter
type
exit
hit enter
Restart and log in as JohnSmith

Obviously it doesn't have to be "JohnSmith". Any Tom, Dick or Sally should work fine (dealers choice).

See if your computer behaves any better using that login.