Hey Kevin,
Not sure if you've gotten an anti-virus softeware yet. If not try AVG, it has a totally free program and you can download it from www.filehippo.com.
Also, back ups are good; however, I use Amazon Cloud to back up my patterns and other things I want to keep. This is free as well. The program presupposes you have a login ID with amazon. If you open amazon's home page you'll see "Amazon Cloud" under shop departments. Just follow the instructions. You get 5 gig free. I have beau coup patterns there as well as pictures of family, friends, and work.
Just a couple of suggestions to help keep from catching a nasty virus.
Eric