You'll need a USB key or memory stick or whatever the kids are calling them these days. Then just google "Asus update BIOS" and you'll see a whole bunch of helpful links. You should be able to handle it from there, but if not...
Grab a USB key.
Flip your laptop over and jot down the model number and serial number, just in case. You'll definitely need the model number, I can't remember for sure about the serial number.
Go to the ASUS.com website. Click "Support", then "Consumer". This takes you to http://www.asus.com/us/support/.
Enter the model number of your laptop. Mine is Q550LF or something like that.
It'll give you a list of options, choose "Drivers and Tools".
Choose "BIOS".
You'll see a list of ZIP files containing various BIOS updates. hover over them and your browser should show the name of the file in the lower left corner. I say this because I chose the top BIOS on the list and it was for an N550 instead of a Q550, wouldn't
install, and I had to start over. (Q550 is the second one down.)
Download the right BIOS, extract the files to your USB key. IF YOU DON'T, when you get into EasyFlash, it won't be able to find the files and you'll pretty much have to restart the computer, extract the files properly, and then shut the computer down again.
Save yourself ten minutes of hassle and do it now.
Now go here: http://www.asus.com/SG/support/FAQ/1008859 and read it carefully. You won't have it in front of you when you follow the next steps.
Follow the directions for restarting your computer and entering the BIOS. With mine I had to hit SHIFT+"Shut down", then press and hold F2 while hitting the power button.
You'll enter EasyFlash or BIOS mode or whatever it's called, and it will look just like what's on the screen on the support FAQ above. Mouse won't work, so use the arrow keys to explore. You'll go to the right spot in the menu -- and if you forget, just
poking around will get you to the right place easily enough -- and click on "Update BIOS". It's surprisingly straightforward once you're in.
Note: As I warned you above, if you haven't unzipped the files on your USB, EasyFlash will try to tell you there's nothing there. It can't unzip the files for you, so you'll have to exit out, start the computer back up, unzip the files, then shut down and
start all over again.
Explore the correct drive, F:/ or whatever your USB key is called, find the BIOS file that you unzipped, hit enter, it does the rest. Takes a couple of minutes but then you're done, you restart the computer, and it should hopefully have resolved the problem.
My BIOS was a few years out of date, so upgrading took care of several issues I'd been having.
Hope this helps. I'm not Microsoft customer support, so I won't be useless and then recite a script at you if it doesn't. :)
Cheers.