I have a Dell Dimension 4600 which has been excellent so far. It has a reasonable graphics card and 2GB of RAM. I currently run 2003 Server on it however I have made the various changes to make it more of a Workstation. As a test I put a spare HD in and installed Vista Ultimate from an OEM Dell disk. Obviously the hardware is not recognised (there is no SLIC table in the BIOS) so the OEM key wouldn't work. On a whole Vista ran quite well so I started to look if a BIOS mod was possible. After much searching I can't seem to find if it is possible with this machine? I know I should really get a new machine but I am quite happy with the performance of this one. Andy