Remember unpacking your laptop for the first time? It was blazing fast. Programs opened quickly and synching your smartphone while making the week’s fantasy football picks didn’t even kick the internal fan on. But with each photo imported and album downloaded, things slowed until one day the spinning color wheel mocks you from behind an LCD screen when you try to open Word. Sure, you could infuse the system with more memory, but chances are a careful cleaning will get some of that speed back.