I have a few Windows 7 PCs I manage and a couple of them are saying that when I try to enter administrator mode it says "Windows cannot find 'C:\Windows\system 32\cmd.exe'. Make sure you typed the name correctly, and then try again." The same happens with regedit. My guess is that this is a virus of some form. I've run malwarebytes, Avast AV for Business, AdwCleaner, JRT and RKill and none have found anything. Or maybe something set a local policy.