If you have an OEM PC (like Gateway, Del, Compaq, etc) go
to their support web page and see whether there is a newer
BIOS for your PC. Do NOT go to a motherboard website, if
the PC is a major brand, unless their support directs you
to do so. BIOSes can be different for an OEM PC and for a
non-OEM pC using similar motherboards.
If you made the PC yourself, or if a local specialty shop
made it, then you should go to the web site of the
motherboard manufacturer for a new BIOS. Be darnd certain
that you ge tthe right BIOS for your PC, or the PC will
bcome useless. Modern motherboards have some protections
to prevent obviously wrong BIOSes from being installed,
but you should never count on that protecting you.
However, I agree with the previous replies that you should
never flash (i.e., update) a BIOS, unless you have a good
reason to do so. Good reasons would be to solve a Y2K
problem, or to some very specific hardware
incompatibilities (not just IRQ conflicts).
With modern PCs you can sometimes download and flash from
within XP. In reality, this approach downloads within XP,
but sets up a batch file that is executed when the PC
reboots.
However, it is often safer to download and copy to a
floppy, then re-boot with the floppy left in the A:\
drive. In this mode the BIOS update routine should ask to
save a copy of the old BIOS on the floppy. Always do
this, just in case the new one is worse than the old one
for your specific PC. Yes, that sometimes happens.
Never flash a BIOS if there is any chance of a power
failure, such as during a thunderstorm. The flash should
take only several seconds, but the PC is very vunerable
during that time.
Assuming a successful BIOS flash, when you reboot XP may
decide to re-detect hardware. So, have driver CDs and
floppies ready, just in case it asks for them. Probably
it won't, but you nver know.
Assuming XP is happy about the drivers, it may ask you to
re-activate. Whether it does depends on how many changes
you have made in the last three months. The BIOS upgrade
counts as one change. If you are asked to re-activate,
try the on-line option first. If that does not work, call
the 800 number that should be listed on your screen.
Explain what you did (i.e., BIOS update) and the Microsoft
representative should assist you in trading strings of
numbers and letters to perform a manual activation. In
all, that takes about 5 minutes.