Answers:
Yes, in that is. Download AVG, which is a free-for-home-use. I've have it for 11 years next to no problems whatsoever. After you download it, scan your entire computer. If you own a virus, it will surely find it and delete it from your tough drive!
http://www.download.com/3000-2239_4-1074...
If you enjoy McAfee or Norton, AVG is merely as fitting, if better. The nice article is that it runs within the environment totally trouble free and you never own to verbs something like it expiring!