Is the computer working at all - ie can you still use the keyboard?
Are these all PS2 mice? - perhaps the socket doesn't work any more - you can blow the input on the motherboard if you plug/unplug with the power on - it won't happen every tie, but it can and does happen. Solution - a USB mouse.
The PS2 mouse has a USB adaptor have tried both connectors. i.e. plug/USB and neither works. The Logitech is USB and as before no response when connected and rebooted. XP showing new hardware detected and driver installed.
Have just got back from next door, I have installed the Logitech drivers from my CD but the mouse still refuses to work. Device manager showing mouse installed, just don't know what else to do? the pointer just will not move.