Upgrading Windows Server 2008R2 Editions With DISM

Recently i installed Windows 2008 R2 server x64 Professional on Proliant with 64GB RAM. Professional version supports only 32GB RAM so i need to upgrade to Enterprise. I found a nice blog that discribes whole process of doing that which i followed : Upgrading Windows Server 2008R2 Editions With DISM.

When i finished I was surprised that my server is showing:

Installed memory : 64GB (4GB usable).

So i went from 64GB to 32GB than 4GB. To make server to see all memory i did this:

1.       Open the command prompt and change working directory to System32 directory

2.       Type in slmgr.vbs -ckms (clears and KMS entry that i used from the formwe blog)

3.       Type slmgr.vbs -upk (removes product key )

4.       Type slmgr.vbs -ipk xxxxx-xxxxx-xxxxx-xxxxx-xxxxx (x’s is your key that you obtain from MS)

5.       Type slmgr.vbs -ato (activates server)