Keys get stuck while playing games

For reference, the keys don't physically get stuck, just that the key press is still registered after I've let go of they key. This also only happens while playing a video game.

So, I've tried looking this up with little luck (found solutions that would work if they applied), but here's what happens:

I'll be playing any video game (it's happened in Borderlands 2, TF2, and Blade and Soul so far) and any key I've pressed for more than a few seconds (such as the W key for forward) will...

Keys get stuck while playing games