a) WRONG - Dell does NOT supply drivers for your sound card using for DAW purposes unless it is made by Dell. I'm not sure any of Dell's sound cards are up to the Spec Sonar requires anyway.
b) WRONG - Cakewalk does NOT test every HP PC. Even the PC's they made THEY tweak for performance and stability like you should. They even wrote they did that. So they certify it. I will certify you if you like. Don't certify me I'm already certified ;)
c) Yes Bub issues get fixed by magic and that's why manufacturers release firmware/driver updates, so people shouldn't install them. Those things fix nothing they are purely for show.
d) Yes Bub that's right, Microsoft publish registry hacks all over their knowledge base articles so YOU shouldn't do it.
e) Yes Bub that's right, Microsoft never ever releases patches that improve stability or performance.
f) Yes that's why Cake's forums is full of stability and optimization tips, even in this very thread. People write them so people shouldn't read them.
Time you stopped listening to the people who seem to tell you these things...
Bub advice has already been given in this post. Over to you....