If I upgrade to windows 7 will my Bios update go away?

If you update the BIOS it will be permanent until you update again, and I don't se any reason why it won't update with Wi 7...

That's what i thought   thanks for the reassurance

The BIOS is the set of firmware programs that are run as soon as the computer starts and serve the singular purpose of getting the computer into the state necessary to boot the operating system. Once the operating system is loaded it takes over and replaces much of the BIOSs functionality.

BIOS updates can usually be applied from within the BIOS setup itself.