Why is my computer so slow?

Episode 1365 (1:35:20)

Roger from Pasadena, CA
SSD

Roger is having issues with his SSD. It's slowing down and takes a long time to access his data. Leo says the drive is only a year old and the computer a few years old, but there can be a drive failure, even in new SSDs. It's time to replace it. He could try running an OS from a USB key and see what happens. If he doesn't have a similar issue, that clearly shows the hard drive has a problem.

Image by Hans Haase (Own work) [CC BY-SA 3.0], via Wikimedia Commons