Unscrew the old one and plug in the new one.
Replace cover and plug back together.
Run recovery software disks for Windows. Wait two days for appt. with the help desk (that would be tomorrow at 10 am) to replace all the necessary software and totally re-image to actually be able to do necessaary work. Fortunately, I have enough programs on the Internet now that I could access several work programs and my online email and still be able to work. I don't know what I was worried about. I mean, if a guy can do it....and I even read the directions!