Cannot navigate using direction keys or tab.
A memory stick lights when tried in all USB ports so they are getting power.
When the mouse is plugged in (it is a laser mouse) it flashes briefly then goes out.
When Windows is loaded sometimes a message comes up saying USB device not recognised.
So I can not navigate to Start to get Control panel to begin diagnostics.
Can start in safe mode and then can use the direction keys but of course cannot get to Start so I an stuck.
Any ideas to make headway on this problem.
I think I need to remove the mouse driver and then re-install it but I do not know how to do this.