On 06/05/2010 19:33, Graeme wrote:

One small problem. I have a KVM switch box, but had forgotten that the
Windows PC is fairly new, and only has USB for mouse and keyboard. Drat.

Not a problem. Use one of these connected between that PC and the KVM
switch.

USB TO PS/2 PS2 CABLE MOUSE KEYBOARD CONVERTER ADAPTER
http://cgi.ebay.co.uk/370352606138 £1.39 inc. post

Mine (not the above but similar) works faultlessly with a Dell Dimension
3100 & Belkin Omni 4-port PS/2 KVM.

--
Adrian C