Roger I can asure all games are virus free and in the event of any file being virus infected i would delete it immeaditatly.

All games on this site are playable, I personally have played every single one, I had to so i could take a screenshot.

You do realise these are DOS games and not WINDOWS games so they won't work in windows, you will need an emulator (all in the help pages, *sigh*.)

From the games you have downloaded (http://www.dosgamezone.com/profiles/?rogerwilco1)
I have personally downloaded and played several of them recently!