I just FIXED it!
The problem, for people who still have the problem, was my driver was malfunctioning with all sound audio, so I downloaded all the necessary files which needed to be updated (or Sean did for me, thank for all, mate). I shut down my laptop, re-installed my Realtek, but still didn't work.
Then, I plugged in some headphones and downloaded Realtek while they were in, and after scanning for hardware, it detected the earplugs, and told me to reboot my comp.
I did that, and voila! The sound problem is SOLVED.
HEAVY THANKS TO SEAN
He saved me, guys, give him excellent ratings.