Keyboard issue

[Jellyfish]

For some reason I can't press multiple keys at the same time anymore, I just noticed this problem today. It was fine around 3 days ago, now I notice that I have to let one key go before I can press another one. For example, I cannot press the up and down key at the same time on GTA, the method through which you kind of drift. Many other issues, such as not being able to do most stuff... and yeah. So I would really appreciate if someone could help, using this old HP keyboard.

[Devin]

If the keyboard is USB, look for the latest drivers for it.
Have you added/removed any hardware/devices recently? Or even plugged the keyboard into a different port?
So all of your keys work but doing multiple keystrokes simultaneously doesn't work?

[Jellyfish]

Haven't updated the drivers recently, however I did re-install them recently after some of the hardware drivers got corrupted and I also changed the USB slot after the last one stopped responding. All the keys are working fine on their own.