Run Elevated Powershell prompt from command-line
Solution 1:
Sure... works on Windows 7+, too.
Open Powershell first:
Type PowerShell to enter a PowerShell session.
Once in the session:
Type Start-Process PowerShell -Verb RunAs and press Enter.
That will open a new Powershell process as Administrator.
------- OR -------
To do it all with only one line from the command prompt, just type:
powershell -Command "Start-Process PowerShell -Verb RunAs"