Laptop running slow

I got this computer less than a year ago. I only check my e-mail, read the latest news websites, and create PowerPoint presentations. When I check my e-mail I only open mail from people that I know. Everything else I delete. I have been following the rules of being safe on a computer since I’ve [...]

This thing is no more than a couple years old. It belongs to my fiancee, I try to keep it running good. But lately its been running very slow. She uses it mostly for school but she also hooks it up to the net and does her browsing, sometimes she does some downloading, questionable things [...]