Hi Baffled,
I Wish I could tell you how to get into BIOS but it is different with each
system. Most likely you need to hit a key just after the bios screen ( The
first screen at boot up )
On Dell systems it is the Del key but may be different on yours.
This item is most likely listed in the manual which came with your system.
It may be called something else, like configuration setup or some other
name. Look at the manual it is probably there.
If that does not work look at the websight for your builder.
Good luck
Richard