Have checked all programmes as you suggested and cant find any anti virus companies other than Mcafee offering family protection. I think the next step is to purchase anti virus from some company , probably AVG as I have that one on the computer upstairs and have had no problems so far and have had it for 2 years unless youu know better"
You don't have to purchase it. Most All the major AV's offer a Free edition of their software to Home Users. - Recommend you look at AVAST. It has more protection than Microsoft Security Essentials, but that also is free. And a good complement to any AV is Malwarebytes Pro, for only $25 USD, and it is a one time charge (lifetime license with no renewal fee)