How do you find operating system version number using PowerShell?

You could use the following commands to find the operating system on your computer:
At the command prompt with the command window open in adminsitrative mode type-in ver or winver as shown:
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C:\>ver
Microsoft Windows [Version 10.0.10586]
==
C:\winver will bring up the About Windows as shown:

winver.png

However if you want to use Windows PowerShell launch it in elevated mode and run the following command and you get more detailed information as shown:
gwmi win32_operatingsystem

gwmi.png