I've about had it with WHS 2011. I've installed two of them in recent months for different customers. One of the customers is trying to backup a new Lenovo laptop that has Windows 8.1, a UEFI BIOS and a GPT disk. So the answer to that is get the hotfix from Microsoft http://support.microsoft.com/kb/2781274/en-us also known as 2781274.
Installing that hotfix broke the server. Not only did it not help it also completely broke the client backup capability. Fortunately I was able to uninstall the fix and regained that function. Next I tried running all the Windows Updates until everything was current then I installed the hotfix again and again no go.
Any ideas?