I have managed to navigate to device manager and no mouse is listed.
There are problems shown under other devices - one of which is listed as an analogue device with no drivers installed.
I'm going to assume that this may be a mouse and install some drivers, but shouldn't windows have done that anyway?
- Let you know soon.
dorsai - your suggestion is the failsafe - but there are no usb posts on this machine so I'll have to buy a pcu usb hub.