Home row of keys don't work

Hello everyone,

I have got this problem with my keyboard and I hope someone would be able to help.

I have a laptop but since I hate typing on laptop I have attached normal keyboard to it ( Mode Come brand ).
Since this morning, the keys ASDF and JKL alongwith 1,2 and 3 are not working while the rest are fine.

The keypad of my laptop of course works fine ( otherwise I wouldn't be able to write a request here ! ) but I have no idea what has gone wrong with my keyboard ? I did restart the computer, uninstall and installed the driver but that didn't help.

Would please someone be able to help ?

Thanks in advance for your advise