Some keys have stopped working!!!!!

[szstatcu01]

Some keys of my hp laptop has stopped working.I am sure it is not happening for dust or fluid fall.

Left Ctrl key, t, y, [ ,] ,{ ,} and F10 is not working.

I use kasparasky as virus guard.I changed keyboard lay out in Language and regional setting ,deactive and active drivers.Nothing happened.

Can anyone suggest me what to do now.I use windows 7 as os.


Another important issue is ,I've edited my layout using Microsoft Layout creator.Some keys stopped working after doing this.


Please give me suggestion.

 

[GeneO]

back to manufacturer on warranty.

 

[szstatcu01]

The warranty has expired 1 month ago.

please show me another way.