Bootcamp Safe Mode

I'm using a late 2015 iMac, running Windows 10 through Bootcamp and I'm in hell. I bootcamped my Mac specifically to play one game, and I need to update my GPU drivers to do so. I have the information I need to update them, because I've reached out to AMD and gotten it. My problem is that I need to boot Windows up in Safe Mode to do so. I've figured out how to do that on bootcamped machine, but once I enter Safe Mode, my wireless mouse and keyboard (the models that originally came with the 2015 iMac) stop working, so I can't do anything. I've read that I need to boot into BIOS to fix it, but I've also read that BIOS doesn't exist or function the same when using Bootcamp. I am not a particularly computer-savvy person; the process of trying to play this game has lead to tech support from 4 different companies over 3 weeks, and this thing with Safe Mode is just the latest roadblock. Does anyone know how to get Safe Mode to recognize my keyboard and mouse? (note- I boot it up regularly in Windows, and it only has the issue with the keyboard and mouse when I try to enter in Safe Mode)

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EDIT: I sucked it up and bought a USB mouse and keyboard. onto the next problem it is!