Thanks in advance for a source of terrific knowledge. First, I encountered the "blue screen of death." During the process of "safe mode".., etc. and after trying F8 F12 and Delete buttons, which I should not have done, I was left unable to boot at all and thought for sure that the hard drive was corrupted. I took the hard drive out and using adapter tools on my spare computer, recovered all on that hard drive. I saw no evidence of corruption. I put the drive back in my problem computer, and have since been unable to get passed the following screen: "a problem has been detected and Windows has been shut down to prevent damage to your computer. If this is the first time you have seen this stop error screen, restart your computer. If this screen appears again, follow these steps. Check for viruses on your computer. Remove any newly installed hard drives or hard drive controllers. Check your harddrive to make sure it is properly configured and terminated. Run CHKDSK /F to check for hard drive corruption, and then restart your computer." Technical information: "***STOP: 0X000000 7B (0xXF78D2524, OxC0000034, Ox00000000, Qx00000000" In my attempt to "auto detect" hard drive, it fails to identify it. All that is currently recognized on the problem computer is my CD ROM and floppy. At this point I suspect I have a hardware failure since the drive is not recognized. I put another drive in that computer and that is not recognized, as well. If this is a hardware failure, how can I identify what piece of hardware is the problem? Can you direct me to step-by-step procedures? memtest1.70 does not run beyond an initial screen showing mostly zeros. As I am sure you can see, I am not as averse as the people on this forum, just someone who is learning and someone who respects your knownledge.