It is not something we suggest unless there is a particular reason for it and in your case there may be with your USB.
I'm not sure if HP has a windows based flashing utility but your mom should be able to find that out for you.
Just be very careful because messing a flash up could render your motherboard useless. There is always a option to backup your existing bios before doing the flash and if you decide to do this then I will try to find the instruction that work with your system.