It appears that you have an ATI display adapter. If you can rotate your screen temporarily you can access the display settings and check for the ATI hotkeys to rotate screen back to normal. I have cats myself and I always Windows Key+L to lock computer. This way if cats jump on keyboard, it doesnt mess things up. You may also try Iams Weight Control cat food to lighten them up!!!!
The offending feline is starting his diet this week! (Too late, of course...)