Here’s one idea I got from this blog post. It came from KB 920730: How to disable and re-enable hibernation on a computer that is running Windows Vista. It certainly was not Windows Vista, but who would want to let their servers hibernate? Besides, Windows Server 2008 is listed on the Applies To section of the KB article. I’ve decided to give it a shot. Run this command on your command-prompt with administrative privileges

powercfg.exe /hibernate off

Now, if you happen to take a look at your system partition and show all the hidden files, you would see a hyberfil.sys file, a hidden system file located in the root folder of the system partition. The Windows Kernel Power Manager reserves this file when you install Microsoft Windows. The size of this file is approximately equal to the amount of RAM installed on the computer. Since we dont need hibernation on servers, you can just remove this file using the command above. Sometimes I wonder why everything is on the system partition when you don’t even need them

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