Well, I updated my bios on my old computer (Hence, my other topics), and now it no longer works, and gives me beep codes that said it couldn't read the RAM.
updating your bios could potentially lock your computer. and make the memory unreadable. ESPECIALLY if you are using an aftermarket or incorrect bios. some people like to installed "hacked" bios and "performance" bios and such. instead of the "manufactorers" bios (wow i can't spell) but anyway. if you installed the bios from the company that makes your bios i find it unlikely that this would happen.
when you did this, did you also open up the computer and mess around with anything? cuz is sounds like a "physical" problem instead of a "software" problem. but like i said it is technically possible.
Yes, that can possibly happen. It has happened to me. However that is only if you manually remove the old version. If not then the old and new versions will remain on your computer.
Most likely, you did not read the instructions for updating the BIOS. If you are doing a major BIOS version update, flashing your CMOS chip by removing the battery for a few seconds will be necessary.