Why Your Computer Is Slow
Your machine used to feel snappy and now every click comes with a little pause. The fan spins up to open a browser tab. You are eyeing a brand-new computer, or worse, dropping money on parts because a forum said so. Here is the relief: slowness is almost never mysterious, and you can usually fix it for less than a hundred dollars once you know which part is actually holding you back.
How to read this
Read the three phases in order. The first gives you the one idea that makes everything else click: the bottleneck. The second teaches you to open the tool already on your computer and watch your machine confess where it hurts. The third turns those readings into a concrete buy-this decision and explains why one cheap upgrade beats the rest on most old machines. Try the readings on your own computer as you go; the whole point is that you can diagnose, not memorize.