Need more accurate computer diagnostic tools to find and fix problems

Original Title: Why does nothing work?

Why are there no accurate computer diagnostic tools? OK. So I have some computer problems. It is not recognizing the sound card and several other things, six in all, yellow exclamation marks beside the DVD drive, OHCI compliant something or other, generic PnP Monitor, the processor (fer gawd's sake, how is it even working?), HD sound card and the PCA standard ISA bridge.

Oh yeah, first of all its a virus, then it is OEM software, so contact them. With all this, the last advice I can get is to reformat the drive and reload Win7, oh yes, and reload all my software, that at least two weeks work. And if that does not fix it, it is a hardware problem!! Why don't we just replace the mobo and see if that is it?

It is like having car problems and the garage says, "Oh yeah, we will just replace the motor and power train and see if that is the problem. If it is still there, it might be the chassis.".

What I want is a diagnostic tool that will examine the computer and pinpoint the problem and fix it. Is this too much to ask - Bill Gates? We have this for our cars. After all this time, it should be possible. In computer problems, there is way too much try this, try that. Time to switch to MAC... or Linux.