Try another USB mouse or try using a PS2 mouse if possible. Are you sure that you are NOT plugging the USB mouse into a USB 3.0 port. You must use USB 2.0 as 3.0 generally isn't natively supported in the BIOS or Windows(requires a driver).
Try all of the different usb ports. Only some work during the install process.
so it turns out my bios is on a unpublished version, i shall update to the latest when i get home or tomorrow, the latest update supposedly fixes some USB compatibility issues
hopefully this helps
OK so the update didnt work so i am returning it to amazon where i bought it