Tackling a weird crash pushed me to learn event viewer basics
I've seen a rise in machines with odd freezes that don't point to clear hardware problems. In my experience, a client's PC would stop working at random times a few weeks ago. All the usual checks came back fine, like temperatures and component tests. So I decided to open the event viewer, which I used to skip. I spent time reading through the error logs and noticed repeats linked to a system service. It turned out a recent Windows update was fighting with their security software. I tweaked a setting and the crashes stopped. Now, I make it a point to scan those logs first on similar issues, and it often points the way. Your mileage may vary, but it's cut down my guesswork a lot.