Recommendations for hardware diagnostic software (bootable)?
My company issued Dell laptop has a pretty robust system diagnostic tool that you can boot into before Windows. It can check the hard disk for bad sectors, check the RAM, check the temperatures, etc etc etc. Altogether it takes about 12 hours to run the entire suite, it's pretty damn thorough.
Is there anything similar available as freeware? I'd like to have an equally (if not more) effective tool for my desktop, but I built it myself so I don't have any fancy manufacturer's gizmo.