Awhile back I had weird messages, my son put in a password or something for the router and now I don’t have that. He said someone was likely tapping into my router to get online (free).
Also on the website I put in the post also has some really good stuff under the “Hot Finds” tab. Also the programs on the website are tested by the members before they are posted.
Then you need to get your son back out there, let him show you what he did, and write down the Username and Password. If your router is locked down, you should be relatively safe as long as you don't surf the "dangerous sites", and you have adequate virus scanning software.