Alienware system reset

Hi

I need to give my new alienware a fresh start - a driver from an astroimaging camera just doesnt work on the machine and i have tried just about everything i can think of to get it to work. My last option is to just start the PC from fresh and reinstall everything. So I want to reset my alienware machine to factory settings but I want to be very sure it does do exactly that - are all of the drivers and other changes that are made to the registry refreshed/gone. The system restore points i tried and the refresh your pc settings didn't seem to resolve my problem at all

Also will i have to reinstall bios a04 as it shipped to me with ao1 (strangely the Inspiron I bought at the same time shipped with the latest bios)

Also will i be able to name the PC differently  as well - currently it shows karen_000 and I'd like to get rid of the 000

cheers

Karen