Not applicable to SharePoint 2013
If Powershell verions 3.0 is installed on your SharePoint 2010 server, the farm will become inaccessible.
The Powershell Version 3 download is located here:
To see if this is the case without opening powershell, search installed updates for:
Run this from the PS console to see which version of the shell you’re running:
This is the error that results: