I always knew vaguely about computer architecture and operating systems, but I didn't know how to implement actual code or draw the big picture. That's why I didn't remember what I learned for a long time. Eventually, I started studying again, and this lecture helped me a lot. Even though the book came out a long time ago and the lecture was written a long time ago, I think it's worth it because it's still available. I didn't dare to look at Jeffrey Richter's Windows Via C/C++ until I finished this book and lecture, but now I have some confidence to look at it.