I have a Win 10 Pro with Hyper-V version 10 on it and I have multiple guest OS set up. I have a guest Server 2012, Win 10 and Win 7 but for some reason I can't get my Windows Server 2003 R2 x64 to install. I just get the 'Boot failure' message. I've tried getting another server 2003 iso but that didn't work either. I can't install integration services either. I think it's already installed. Ideas?