Up/down left/right arrow keys not working properly

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I have been having trouble with my arrow keys. My up/down left/right arrow
keys are not working properly on my laptop. My scroll lock is disabled and I
have no solutions on how to get them working again. Plus the keys get stuck
while I'm typing. Can someone please assist me??

You may have a defective or damaged keyboard.
WHAT WAS SPILLED ON IT?
I would be very tempted to call the manufacturer and see if there is a
replacement available.
IF you have real world experience with electronics, you 'may' be able to
remove the keyboard and clean it, then reinstall it.
If you have any doubt as to how, seek a professional repair shop to do it.
To me, that means someone other than the amatuers at Geek Squad.

most laptops have a special key called Fn (function) that
enables-disables the arrow keys and scroll locks etc

see an image of an Fn key, but its placement differs according to model of
laptop
http://resources.online.nwtc.edu/med.../fnmonitor.jpg