So I have a Dell Inspiron 15-5555 laptop, and for only $350 it does really well. I had my computer in sleep for like, 2 or 3 weeks and when I came back to it, it was astonishingly slow. For about 15 or 20 minutes, the hard drive displayed at 100% usage in the Task Manager. Now it's fine, but it's taking soooo long (way longer than it used to) to start up and load everything before it goes back to normal operation speed. I already plan on going from 4gb of RAM to 8gb (4x2) and going from a 500gb Seagate Hard Drive to a 120g Samsung 850 EVO SSD, but why would this be happening?