Recently I have installed 4 computers with windows osr2. 3 of them used ATX power, and these 3 will not shutdown properly. Sometimes they will shutdown fine and turn themselves off, but most of the time they will hang on the windows screen where it says it is getting ready to shutdown (blue screen with scrolling bit at bottom), also sometimes it just takes ages to shut down i.e. just stays for ages on the bllue scrolling bit. I am assuming that it is something to do with atx power as the other computer i installed was at AT and i used the same version of windows on it.