My keys have gone mad, please help me.

[s_irminger]

Hello,
Since a few days I have been having problems with some of the keys on my laptop. I'm not sure if the problem is due to a virus or a configuration problem, but I can't remeber either downloading o changing anythng prior to the problems occuring. This is what has happened; whenever I press the keys 8, u, i, j, m or b any number of things will happen. Instead of just typing the key I press a sequence of letters is typed (without me doing anything) or commands are executed. Each key has a limited number of different responses (I don't get a new, random, respons everytime), but I have not yet been able to find any pattern in the way a specific key chooses between these limited options. In other words, I know the dfferent possible responses for pressing "i", but I don't know which one will be used. Below you can see some of the different responses:
i: "qetgio", "tgio¨", etc. Also enters shorcut menus while in Office (same result as pressing Alt while in Office), etc
u: "24ryu0", "å", "yu0", etc. Also opens Excel, Internet Explorer, Window's option "Run" and activates Caps Lock, etc.
j: "wdfhjl", "Ä< WDF", etc. Also acts as "Delete" button, etc.
8: "135789", "´P", etc. Also acts as "Delete" button, etc.
m: "zxvnm", "m,", etc.
b: "sackb.", etc. Also acts as "Ctrl+P", etc
I would be very grateful for any kind of help that will allow me to use my computer normaly again.
Sebastian