The crash can corrupt the OS. To look into this any deeper can tax owners as they learn more about Windows crash investigations than they ever signed up for. For example you learned about the reboot on crash and how to turn that off. Next up is the EVENT VIEWER and using google to search for more information about what you find in the EVENT VIEWER.
But I rarely see this sort of crash to be power supply related.
Last week, I couldn't turn on my computer. I took it to a local repair shop. The technician side it was the power supply, by he didn't have any HP power supplies in stock. He called HP to get one specific for my tower, but HP doesn't make them any longer, so the tech installed a generic power supply. It fits in the case, but there's an inch gap on either side. Now the computer turns on and operates, but opening programs and working with files and folders now take much longer than they used to. Also my computer restarts when I try to run the shutdown program. I found that if go to the Startup and Recovery menu and disable the "Automatically Restart" under System Failure, it will shut down. What could have happened to my computer and could these problems be related to a different power supply?
HP Pavilion 750n
OS - Windows XP home
Processor - Pentium 4, 1.6 GHz
RAM - 768 MB (upgraded form the original 512MB)