From http://techreport.com/forums/viewtopic.php?f=36&t=63600: "I used vlite to slipstream the hotfixes (there were two, one ~2 MB, another ~ 300KB) that Scott had said Microsoft recommended into a standard Vista x64 SP1 Home Premium install. I still ended up with a 0x0000005d stop code as the installer launched. I'm wondering if that hotfix does what we think it does, or if maybe vlite doesn't do what we think it does." I think what is happening here is that you see, there are two WIM images that is used in Vista Setup. One being the main Vista WIM, another being the WinPE 2.0 image used to boot the Vista DVD. In other for Vista 64 to be installed properly on a VIA Nano processor, the hotfixes has to be integrated onto both WIMs. vLite (and Vista Hotfix Installer) is probably only integrating the hotfix onto one of the WIMs. BTW, it would be nice if VIA provided an option to fake CPUID vendor ID to be "GenuineIntel". It would help a lot here.