I bought it off a friend 4 years ago, i think it's custom built

Processor: Intel (R) Core (TM) 17-3770 CPU @ 3.40GHz
System Model: To Be Filled By O.E.M
System manufacturer: To Be Filled By...

So this has been an issue for a while now,
Every time I try and install 'Realtek HD Audio Drivers', My PC doesn't install them, and says it's the drivers aren't compatible. In the sound tab in the...

So I have been able to get sound by connecting the aux cord from my sub into my computer screen [LG 27M45-4] but the volume is pretty low and distorted. I've tried plugging it into the motherboard...