EAC

I initially thought it might be an issue with VLite, but as I mentioned previously, I also set up a new pc using the original Vista Ultimate x64 disc, no integrated hotfixes, and no use of Vlite. Once installed I updated it via windows update. Then once that was done and the pc had rebooted, I manually installed KB941649, and it stuck on configuring updates. Rebooting made it just hang on the loading screen.

I've just some more testing and it seems that Maw is correct - Vlite isn't at fault. Installed Vista Ultimate x64 without Vlite, and updated it via windows update. After it had rebooted, I 'manually' installed KB941649. This seemed to work ok, but got stuck on 'configuring updates'. I reset the computer and sure enough, it now gets stuck on the loading screen. Well done Microsoft

I've had a worse problem with that update. I installed it 'manually' and after my PC had rebooted, Vista just hangs on the loading screen. Safe mode etc don't work either. So I tried creating a fresh Vlite'd Vista install disc, which includes all of the relevant updates, including KB941649. When I tried to use this the install hung once it reached the 'completing installation' stage. This is all on Vista Ultimate x64. EAC.