You must be using an out of date browser. The new browsers will not let you open a site that has a virus. You have to update your browser just like you do your computer. If you get one from an email then the virus program you have does not have email protection or it is not turned on.
DH bought me a Mac Air Book. He thought I would like a laptop. I don't like it at all. It's over there sitting in the box. All my quilt programs run perfectly on my pc and that and internet is all I use the computer for. I don't keep files or records or do any business on mine.