Ok, so for some reason, my mouse and keyboard weren't working at the Windows Login screen for Windows 7. They have worked in the past. Even when trying Safe Mode, it doesn't work.
The keyboard and mouse to light up properly, and the keyboard works fine during POST.
I tried doing a Windows Start-Up repair, and the mouse worked during that portion.
But, when I started switching the cables around in the back, they worked.
So, why is Windows picky about which USB port I use for my mouse and keyboard >,>