A simple upgrade made my 10-year-old computer run like new, and it costs less than $70

The Insider Picks team writes about stuff we think you'll like. Business Insider has affiliate partnerships, so we get a share of the revenue from your purchase. Antonio Villas-Boas/Business Insider Many old PCs and Macs run slowly because they have a slow hard drive inside. If you're considering upgrading to a new machine, you should first consider swapping your computer's hard drive out with an SSD (Solid State Drive) instead. SSDs keep your data on super fast flash storage, which makes everyt...