Keyboard not typing correctly

I know there was a previous topic about something similar to this but I didn't find a solution to my problem and the topic is closed. If I'm in the wrong area please move to the right one I wasn't sure were to go.T-T

I'm running on a HP Pavilion a6230n desktop running on windows vista. I use Firefox (and Internet explorer, my parents use it) The computer is about 3yrs old. The keyboard came with the computer.
The problem I'm having is with my keyboard not typing out what I'm spelling. For example if I wanted to go to deviantart.com it'll come up something random like 6[h4;clw\o==v,. I have to erase and retype for it to work right (It's happening in both firefox and internet explorer). And it's not just urls, it happens when I try to log into an instant messenger(spells my username wrong) and has happaned when I'm typing a reply back to someone to typing out a new im to send. I don't have an issue typing in forums, or in emails,etc. It's just the url,and im issues I'm getting.

I've already tried cleaning my keyboard(which it looks a lot better but I'm still having the issue). I'm not sure what else to do other than consider seeing if a new keyboard has this issue or not.

Can anyone help me out? I'm at a loss on what to do on this irritating issue.

 

Does it do this in Safe Mode?

 

I don't know I've not tried this in safe mode, didn't think I needed to.

 

If it works in Safe Mode, it's a software problem.
Try it.