Hi Mick. Like I said in my previous post I had a perfectly working vista Philips X66. After trying to install win 7 on it it failed to reboot and stalled at the Philips splash screen and wouldn’t even enter the BIOS. The solution for me was to exchange the hard disk in the machine for an alternative one and then it worked again no problem. Others have said they have done this also. Don’t see how simply installing Win7 stops a hard disk from working and also prevents you from entering the BIOS but this is what happened to me. So maybe you should give this a go. Others say update the BIOS but I don’t see how you could do that now from the position you are in.