If not free, low cost software to look at car computer using a laptop.

I am interested in getting started in computer repair. I have seen many computer diagnostic boards that you plug into a PCI slot. They will tell you if the motherboard, power supply, memory, processor, etc. are dead or dying. Anyone have any experience with these? I DO NOT want diagnostic software, I want information about a diagnostic CARD. Are these worth the money? Do they work? Can someone recommend a decent one? Thanks for your help!

any suggestion. And if its possible if it has some sort of windows program to make a software cd backup or whatever its called?

I need something that does it all; ie, registry cleaning, virus targeting,problem-solving,speed-incfreasing,garbage-removing,et
. Kinda like an overall optimizer..