Hi and thanks for taking time to help us folks!
A number of months ago my computer started to crash while encoding and/or burning movies with Nero. It crashed in this manner: I'd hear a little "pop" and the computer instantaneously turns off, losing everything currently worked on. It is basically the exact same "pop" sound and subsequent go-black zap-off that happens when you hold the power button down several seconds until it shuts off.
After a few months, I was using the computer for longer periods of time and it started popping and shutting off after a couple hours of use *without* Nero (or any other heavy program) being open, leading me to believe that Nero was not causing the shut-down issue but rather it was always shutting down with Nero simply because that's when I was keeping the comuter on for more than 90 minutes, waiting for a movie to encode. I tried using other smaller programs like DVD Flick and it consistently zaps out while waiting for that to encode & finish too (it is much more time consuming than Nero).
My computer is a Toshiba Satellite L675 with an AMD Premium Vision processor and Windows 7 OS. I am using a replacement battery, but the problem did not seem to follow the battery replacement.
Any help you can give me would be greatly appreciated. Giving up authoring of my family's home movies is a pretty big sacrifice, but it's crashing me on a daily basis even without the Nero. Please let me know if you need any additional information. I look forward to hearing back - thanks in advance for any assistance you can give me.