So a so called bug surfaced recently that I've been ordered to fix about a few times from here and my server. Thing is when it comes to this bug I don't know what's causing it, and the bug is known to be Speedee getting into the office when still putting in the right code.

The reason why I say I can't fix it (or know how to) is because the coding which detects if it's wrong or right is just 2 pieces of coding, 1 being the detector of if the code is right, and the other if it's at all different than any of the numbers it gives in the order of the 1st digit to the 4th.

Any way to prevent this?:

If you're at all playing on fullscreen, that may a possibility that it's the issue, because the command prompt was always a bit quirky when it comes to playing the game on fullscreen. So try playing it windowed and seeing how it goes. If that also doesn't work then I'm not really sure what to tell you. While a large audience says it works a smaller percent doesn't. So I'm not exactly sure.