I'm no tech savvy so when it comes to downloads and upgrades, I always relied on hubs or my daughter. I didn't even know that the reason sometimes when a computer or laptop slows down is because of low memory. That's what happened to my laptop. I was surprised that even the simple opening of an application took eons to load. It was my daughter who told me that I needed to upgrade my macbook memory for it to perform better. Same thing happened with our PC. I'm glad she told me because if it was just me, I'd bring it to the service center and probably spend more for the memory and service.