I am unable to activate home server 2011. I get an error code of 0xC004C756. The activation server reported that it failed to insert product key binding. I am unable to find any help on home server 2011 on this error.Chris Medina

I am having the same problem with Win 7. That doesn't help you but at least you know its not just home server now :(

I have the same exact error code attempting to activiate Windows 7 x64 Ultimate

Also the same with Windows 7 Professional.

Same error for Office 2010 Pro

Same error for Office 2010 Pro. Phone activation down too.

I fixed it. The Microsoft activation server were down.Chris Medina