Windows 10: CMD off after 1 second

Hi all,
Wanted to run SFC so typed CMD in the run line, right clicked CMD, run as administrator and the CMD screen flashes on for a split second and then off. Got it through windows power shell OK, ran SFC and no errors.
Ran Malwarebytes, SuperAntiSpyware, Rkill, Adwcleaner, JRT and nothing shows up. Still can't access the CMD screen through the "normal" way/s. I am using the classic shell program, if that makes any difference.

Does this happen only if you try to run CMD as admin? Or does it also if you run it without admin?

Can you start CMD from Task Manager->File->Run new task?

This may not apply but I've seen times when trying to run the Command Prompt where the icon stayed on the Taskbar but the window didn't appear to be open. Checking the bottom of the icon on the Taskbar would show a blue bar under it so I knew it most likely was open but just hiding behind other windows on the desktop. Minimizing or closing the other windows brought it into view.

Berton said:

This may not apply but I've seen times when trying to run the Command Prompt where the icon stayed on the Taskbar but the window didn't appear to be open. Checking the bottom of the icon on the Taskbar would show a blue bar under it so I knew it most likely was open but just hiding behind other windows on the desktop. Minimizing or closing the other windows brought it into view.

Funny thing, just tried and it did show up on the task bar so I closed down my browser and the CMD screen was there for maybe 5-10 seconds then poof, gone. But.....it's not the proper screen, no task bar or writing, just a box with a cursor flashing. The icon on the taskbar was also odd, here's a snip

Polar......same result either way admin or me.