Hi and welcome to Geeks to Go. You are right, best protection is to completely disconnect all wires at the computer, such as power and phone. There are lots of products available that will offer protection. It really does not matter which one you get, as long as it does what you need it to do. Lowes and Home Depot have such devices. So does Walmart. You can probably find what you need at a local store near you, without spending a lot of money. You probably want one that allows you to run your phone line through it. I saw once of these in a package of power stips/surge protectors at Sam's Club not long ago.