Windows Server 2008, Hyper-V and iTunes not playing nicley

Right, not strictly .NET Releated, but since some of you may be running 2k8 and Hyper-V as workstations, you may also be using iTunes and Apple TVs... This is a warning to you. after a while of syncing, Win2k8 can loose network connectivity... and completly. only way to get it back is reboot...