Attempting to run a PowerShell script I got the following error:

File C:\Work\ps.ps1 cannot be loaded because running scripts is disabled on this system. For more information, see about_Execution_Policies at
+ CategoryInfo : SecurityError: (:) [], ParentContainsErrorRecordException
+ FullyQualifiedErrorId : UnauthorizedAccess

To run PowerShell scripts (files that end with .ps1), you must set the execution policy to Unrestricted. This is done by issuing the following command in powersehll

*note* you need to do this in a elevated powershell (run it as administrator)

Once you do that, Windows will allow you to execute any .ps1 file.