I installed from a TechNet ISO Win7x64 pro and it went fine. Boots up with no problems - at least for the next few days - until I have to activate it or reinstall again anyway. I used the AMD64 drivers for it and installed like the wiki said balloon, net, vioserial and finally viostor order. For my Windows7 32bit VMs I transferred from an ESXi box I used the 32 bit drivers. They are working fine as well on same 6.0.1 unRAID server actually. It is a SandyBridge CPU and Tyan S5512 MB with 16GB memory if that makes any difference.