Well...there IS a way of going back if you kill the BIOS...
Pop out the chip and send it in to your PC/motherboard manufacturer. You could also always give the chip to a friend who has an AOpen/Gigabyte motherboard with a dual BIOS chip setup, and have him flash your chip with a new BIOS.
It rarely happens, though. It's never happened to me. I have flashed BIOSes twenty times or so with no problems...My current motherboard has been flashed six, I think.
Ya know, he might have picked up the CIH virus over the internet...that permamently erases your BIOS via Win$hit.
If you are getting a CMOS Checksum error, clear your CMOS. There is usually a jumper you have to short or you have to take the battery out. Consult your manual.
Buy a UPS (Uninterruptable power supply). You can pick one up off Newegg.com for around $30. It protects against power surges and spikes, so when the power goes out, you won't lose your work. Many of them can also be set up so that when the power goes out, they will turn off your PC and save all your work after a certain number of minutes.
LASTLY, DO NOT SURF THE WEB WITH INTERNET EXPLORER. DOWNLOAD MOZILLA FROM
www.mozilla.org. IT WILL BE THE BEST MOVE YOU WILL EVER MAKE.
Who makes this computer, may I ask?