I'd imagine your keyboard is broken. If you know how pull out the key/open up the keyboard and take a look, It could be a damaged pressure pad or cracked solder. Otherwise you should just go buy another one, or if its an expensive keyboard go find your receipt and check the warranty.
>>3 No, the keyboard is not 'built in'. You can remove it. Search your laptop model number and 'remove keyboard' on YouTube and there will be tutorials.
Issue Resolved!! Turned out the problem was a bad connection with the keys as they were not giving input. SOLUTION: Press down on the affected key(s) REALLY hard, to the point where you can feel them start to warp a bit. Once you've done that for a couple of seconds, let go and try typing. If this does not work, it may be a problem with drivers, junk (like crumbs) in your keys, or an issue with the connection of the actual keyboard within your laptop to the motherboard. Thanks to the people who tried to help me out, and I hope somebody with the same issues finds this helpful. ;D
