Again think it is the same for the BIOS, if there is a BIOS update available i think you just call PCS and they will issue you with the update and talk you through the BIOS update.
Its not something i've ever tried myself so in not 100% on this one sorry
My MOBO wasn't shipped with the latest bios. I had loads of problems with Windows 8 and my GPU and in the end it weirdly all got resolved by updating my bios! So if this happens, I would suggest trying that
Depending on your motherboard a bios update should be pretty easy, but it isn't recommended unless absolutely necessary! PCS will be able to talk you through it, as others have said.
My Optimus IV was not shipped with the latest drivers either and the ones that were sent were not stable either. It took me a week and a combination of drivers from the various manufacturers' websites and some of the ones on the disc to get the computer working properly.