Hello everyone at MDL. I am a new member, having just joined today. I would first like to say that this is a wonderful site and I am in awe of what the members here have accomplished and the valuable information collected here. Through Technet I have installed Windows 7 Pro VL Build and tried to understand what is different about it. I had some trouble searching for answers on this topic so I would like to share what I have learned so far. I even tried to get information from the borg itself about this matter but in the end I have had to test it for myself. Windows 7 Pro VL build can activate with a Retail or MAK key. The MAK key for Windows 7 Enterprise also works on Windows 7 Pro VL Build. During installation it does not ask for a product key and afterwards it automatically looks for a KMS server for activation. I would guess that these are the reasons why the VL build exist. I believe but have not tested that the MAK key would also work on the retail build of 7 Pro. One last thing I have discovered is the Windows Vista Enterprise MAK can also activate Windows Vista Business editions.