Trevor said:
When I boot the PC up without the keyboard attached then attach the
keyboard, there is no message from windows and the keyboard doesn't then
work.
Rebooting with the keyboard attached it words fine.
I wasn't talking about physically unplugging the keyboard before reboot - I
meant in the Windows Device manager (right click my computer, then choose
manage), find the keyboard in the device manager and "remove device". There
should be no need to physically unplug the keyboard.
On some PCs, a PS/2 keyboard is detected at power on time (POST), so it
won't work when you plug it in later.