Hot on the heels of the Windows 8/2012 release candidates comes the PowerShell v3 (well Ok the Windows Management Framework) release candidate.
This is available for
- Windows 7 SP 1
- Windows Server 2008 R2 SP 1
- Windows 2008 SP2
32 and 64 bit versions are available as applicable to the OS
Notice the omissions Vista, Windows 2003 and XP. If that continues into RTM there will be some issues around using the some of the functionality across the estate as it relies on WSMAN 3.0
Details and links from here