I am using Windows 2008 r2 64 bit system.
While testing our script ,we did right click on powershell (which is present in taskbar) and import system modules.
There's a hidden powershell switch to load system modules:
powershell.exe -ImportSystemModules
System modules reside in the $pshome\modules folder. The equivalent command to load them would be:
Get-Module -ListAvailable | Where-Object {$_.Path -like "$PSHOME*"} | Import-Module
UPDATE:
The -ImportSystemModules switch has no impact in v3, looks like it is going away.