Q: Stuck in Windows

Hello everybody.

I have installed Windows 10 via Bootcamp in my MBP 17 Late 2011.
It all finished successfully but somehow the usb stick the Bootcamp software was on got corrupted. Hence i cannot install it.

Another consequence is that i cannot set a net target (the MacOS partition) to boot from.

For boot options, Option ⌥ or Command (⌘)-R send me to the firmware password screen.

I just need to set up my startup disk back to mac so i could re-download the bootcamp files specific to my MBP.

Are there some downloadable Bootcamp files specific to my MPB? Is there any workaround except changing the amount of RAM then trying to resent the NVRAM?

Any help would be apreciated.

Thanks!