Asus N73SV keyboard

This laptop has extra buttons in left for multimedia, volume buttons etc. How do i enable them?

They should all ready be enabled. Try pressing the Fn key then what ever media key you want.

Tryed, not working. I also cant disable touchpad

All the ASUS recommended drivers installed? On my Acer Aspire laptop a lot of those custom keys didn't work with the basic default Windows 7 drivers. I had to install the Acer drivers. On my Acer, the media keys were actually connected as part of the touch pad and didn't work until I installed the correct Acer supplied Synaptics driver. The keys I'm referring to were play/pause, next, back, and stop. It really had me scratching my head trying to get them to work, because any desktop keyboard I ever owned with those keys on it, worked right away in Windows, without having to install any special drivers or software.

ATKPackage was missing, now it works. Touchpad also, needed to ionstall Elantech Smart-Pad utility

Yeah, I don't get that ATK missing driver thing. Both of my ASUS motherboards have that problem even after installing the chip-set drivers. It took my a while to figure out what that was and where to get it and how to install it. You would think it would be included in the chip-set drivers.