Hay my keyboard problem.

Have you tried downloading the audio drivers for the computer?

http://www.samsung.com/ae/support/model/NP-N130-KA01AE-downloads?isManualDownload=true

two things it could be, first, yes broken and second the ribbon cable under keyboard are not in place

Have your shut down, unplugged, remove battery, plug in, rebooted? Try here for a User Manual: http://www.samsung.com/us/support/owners/product/NP-N130

NUMBER LOCK
You have press the NumLk key (number lock) and this changes the right hand keys to a number pad.
Press the NumLk key (also doubles as the ScrLk key to toggle the Number lock). it is near the F12 function key. When the NumLk has been enabled a LED light is turn on to indicate this function has been selected. Press the NumLk key again to turn off the Number Lock and Num Lock LED indicator.

Hi
If your function key stuck use this FN+NumLk

Hello, Look for the screen splitter key Try to press the Fn key + screen splitter key

Hi,

Welcome to FixYa!

It seems that you are having problem with the keyboard functionality. Is it typing numbers instead of letters? Just press Fn Nmlk for you to be able to disabled the Numlock on the computer.

Hope this information will help. Thank you for using FixYa!

Press Fn + NumLock to return to normal.
http://www.tomshardware.com/forum/46929-35-problem-function-acer-samsung-laptop

Try to re-enable the startup programs. You don't need that program to enable start-up items. However, you will need to do some digging to find out exactly WHAT has been disabled. Otherwise, you have no other choice BUT to do a clean install, or revert to your last backup. Those options are way more trouble than reinstalling software.