Unable to install Active Directory Web Services on Windows 2008 SP2
On Windows 2008 Server you are not able to install the ADWS?
Try to install theMS Dot.Net Frame Work 3.5 SP1 and then try to install again.
It worked for me :) and also :
http://funneverstops.net/2011/10/26/install-powershell-2-0-on-windows-2008-sp2/