Keyboard keys suddenly repeating faster than they should

[gavinormous]

I have this issue where when I hold any key down on my keyboard, it will repeat like normal for about 2 seconds, and then the repeat rate will suddenly increase. This is very troublesome when I try to play a game, as it causes stuttering in movement.
For example, when I try to play Minecraft, I'll hold down the W key to move forward; it will work for about 2 seconds before the sprint mode will begin to rapidly start and stop. When I play Terraria, I can move left or right like normal for about 2 seconds before my character slows to a near stop, and then begins to stutter in that direction, as if I were manually pressing the key repeatedly.
I have no idea what to make of this issue and can't find a fix. Could it maybe be a virus?

 

[CountMike]

Control Panel > Keyboard and you can adjust repeat rate and delay

 

[gavinormous]

Control Panel > Keyboard and you can adjust repeat rate and delay

That's not the problem. No matter the repeat rate or delay, if I hold a key down, it will still begin repeating incredibly fast on its own.

 

[CountMike]

If it doesn't do that in normal windows use than it's something wrong with those games game settings. I never heard of a virus doing things like that. If that's some custom KB try drivers for it or just go to device manager, uninstall KB driver and replug it.