if you understand how your computer/Windows works
That's one hell of an insinuation there. If you truly think that OS/Hardware problems can be perfectly diagnosed and resolved according to the book then you've got a hell of a lot to learn about the irrational bullstuff that is computers. Now of course, I'm not saying that it isn't a problem that will require a clean OS re-install or at least the use of Windows repair. What I
am saying is that if you don't try the most basic "cure-all" solutions first then you're going to feel like a real loving idiot later if your big, time consuming solution doesn't work out and then, when you try it out of desperation, these "cure-all" solutions fix your problem completely despite it being completely unrelated to what should be able to what those solutions are supposed to do.
I will not even attempt to regale you the many tales of my being left completely dumbfounded when a problem with
my OS, which I spent all day attempting to fix using various guides and threads online, is instantaneously resolved once I clear the CMOS.
If it's quick, easy, has the potential to work and won't cost you anything if it doesn't then there's no reason to not give it a go, even if only for the sake of making sure that it isn't the solution