Hey, vidood again! I got it to work! This is what I did...
-On your computer there should be a button that says "Assist" (like up on the top right-hand side of the keyboard). Click that. It should bring up "Sony Care"
-Then click "Input & Output"
-It might ask "Are you using a wireless keyboard"? say, "No"
-Click "Keyboard problems"
-Follow that until finished
After that my keyboard went back to working! Not sure what had happened in the first place, but all is well now. Hope this works for you!