Computer Not Accepting Keyboard

[Bee35]

Does anyone knowhow I can get into my computer without using a keyboard? I have tried 3 different keyboards, so I know the fault is not there.
I know how to get to the accessories menu to use the on-screen one, but the problem is my start-screen/log-in screen is password protected, so I cannot even get past that to use the mouse for menu access. in other words I am completely stuck! help!

[Bee35]

Posted in 'motoring' by mistake! :/