Settings affecting keyboard

I was browsing the web one day when my leg hit the desk a little too hard, which led to some water falling on my keyboard.

In an attempt to dry it, I used a cloth to wipe the keys down.

I thought that I had unplugged it first, but I didn't, so it messed up a bunch of the stuff that was on the screen.

It's been about a week since this has happened, and I still have the problem.

It has been alternating through problems for a while, from typing extra numbers whenever I type a letter to downloading links as firefox documents, to not even being able to type at all.

I know that this has to do with my computer settings (must've messed it up while drying my keyboard) because I've tried other keyboards and it still didn't work.

I have been forced to type this whole thing with the on-screen keyboard.

Anyone know how to fix this?

 

Please note that wireless keyboards work fine.

 

Windows 7 64-bit.

I've tried several different USB ports and several different USB keyboards to no avail.

I even tried restoring my system to before the incident, yet it still has the same problem.