Trying To Shrink Partition -> "access Is Denied"

[minitraktor]

Hi!

 

I want to shrink one of my hard drive partitions, so that I can give the space to another partition. I have done the following:

 

1. Start -> Administrative Tools -> Server Manager (I right clicked and chose "Run as Administrator")

2. Storage -> Disk management

3. Right clicked the partition I want to shrink, chose "Shrink volume", specified the amount of space to shrink

4. Clicked "Shrink"

 

The result: I get an error message saying "Access is denied". The pop-up window displaying the error message has the title "Logical disk manager".

 

What should I do to get it to work?

[minitraktor]

Do anyone know? I suppose it has to do with administrator rights. I am using the standard account created when installing Windows Server 2008 and I suppose this should have all the rights? If not, how do I get them?

[AWS]

Yes you'll need admin rights on the server.

[minitraktor]

How can I obtain admin rights? I thought I had them already :/