I want to activate my Windows 2008 Server R2 Enterprise Edition on my Computer via Internet. I tip in the Product Key (I get from my University(MSDNAA)) now i get following message: Problems activating Windows. Errorcode 0xC004C020 What can i do? Greez Tobi

Hello, that means that the activation server reported that the Multiple Activation Key has exceeded its limit. More here: http://support.microsoft.com/kb/938450 You have to use another key or to contact Microsoft Technical Support in your country for assistance. This posting is provided "AS IS" with no warranties or guarantees , and confers no rights. Microsoft Student Partner 2010 / 2011 Microsoft Certified Professional Microsoft Certified Systems Administrator: Security Microsoft Certified Systems Engineer: Security Microsoft Certified Technology Specialist: Windows Server 2008 Active Directory, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Network Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows Server 2008 Applications Infrastructure, Configuration Microsoft Certified Technology Specialist: Windows 7, Configuring Microsoft Certified IT Professional: Enterprise Administrator Microsoft Certified IT Professional: Server Administrator Microsoft Certified Trainer