Reverted from Windows 10 to 7, keyboard and mouse not working on lock screen?

So I recently downgraded from Win10 to 7 and after everything finished, I can't type in my password or move my mouse! I tried replugging the USBs to no avail and I restarted and booted my pc in safe mode And now I'm stuck on the lock screen in safe mode. How do I fix this?
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    If you are unable to access the BIOS normally after Windows 7 rollback, but were able to do so previously, then try performing a BIOS reset. Remove the CMOS battery for several minutes, then reinsert it, and start your PC again. Try restoring your Windows 7 to an earlier restore point (when you believe your computer worked fine) would be the quickest and easiest way to resolve the issue.
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