Unable to run powershell command at SharePoint 2010 server

Issue:
Some time you might be getting the following error message while running the powershell command at SharePoint 2010 server.
The term "" is not recognized as the name of cmdlet, function, script file, or operable program....
Resolution:
Run the following command:
add-pssnapin Mricosoft.SharePoint.Powershell  and then Press enter