C:\Users\atlas\Desktop>psexec.exe -user atlas-host\atlas -i cmd.exe
PsExec v2.2 - Execute processes remotely
Copyright (C) 2001-2016 Mark Russinovich
Sysinternals - www.sysinternals.com
Password:
PsExec could not start cmd.exe:
Access is denied.
C:\Windows\system32>whoami
nt authority\system
C:\Windows\system32>runas /user:atlas C:\Windows\system32\cmd.exe
Enter the password for atlas:
Attempting to start C:\Windows\system32\cmd.exe as user "ATLAS-HOST\atlas" ...
RUNAS ERROR: Unable to run - C:\Windows\system32\cmd.exe
5: Access is denied.