Keys on asus f3k series don't work

Hello,

Keys on keyboard asus f3k series stop working one day. I decided to remove each key and clean it myself. It didn't solve the problem. Then I installed spyware and it found some infected files in win32 system. I delited it and yohoooo some key's start working normaly, but not all of them :( there is still some keys remaining which doesn't work and spyware can't find it.
Please help me :}