what are some computer diagnostics tools?

that can scan every part of the computer, memory every thing.
i think one of the diagnostics tools start with the letter H.
i can think of the name.
but if you know of any diagnostics tools that can do this please tell me.

there are tons of them ill look the name of the one i got that has every tool you can imagine on a bootable cd add me to overide_u_2003 on messenger and well talk further.

belarc is a good program that will do the basics like you want to do or as you explained above

Unsafe Doctors Kill Patients: save lives by computer diagnosis – Future Health Keynote Speaker