Tony broke the golden rule and rang me at 10-30am
He turned up around an hour later and dumped his brand new Medion on my desk.
Hed been trying to install a copy of XP Pro 32 bit and was expecting to be able to wipe the original OS off the drive and to be able to create 3 partitions on it , one for XP, another partition for Vista 64 and a third partition for storage.
As it booted from the XP CD it got to the copying files part and blue screened.
We both thought that it was something on the hard drive that Medion had put on to stop it taking another non medion supplied OS for some reason.
I tried a few things which all ended up with the blue screen before it would format the drive so I took the drive out and added it to one of my pcs, formatted it and created the 3 partitions in disk management.
We put it back in Tonys PC and booted from the XP CD. Same thing happened again at the same point.
I decided to look in the bios and eventually noticed that it wasnt detecting the SATA drive.
I dont know how it was managing to boot into its original Vista installation as it couldnt find the hard drive that the OS was on and I still dont know how it could do it
Looking at the settings in the BIOS it didnt even list the SATA drive in the list of drives at first, then it appeared somehow after I clicked on something but cant remember what I clicked on, but it still wouldnt find it when installing an OS, until I altered it from being AHCI to IDE.
Once we had changed that setting in the BIOS it installed without any further problems, apart from getting the drivers to install.
Eventually we had it dual booted with XP pro 32 bit and Vista Ultimate 64 with everything working correctly and Tony drove off back over the border to the dark side (Yorkshire) around 6pm