Thank you for asking this question. I've seen that message for the past few days and was a little concerned.
It is embhome that those that, as I am also computer illiterate, I stop going there. The warning is pink in the top of the page.
OK I went there and it is not a virus it is a problem with their Zen cart. The site admin has to fix it, it most likely needs to be updated
Do you have a link for the site? I googled embroidery home and went to the first link supplied and I do not think that is correct
I can't help you as I just got the same on mine for the first time this morning. Hope someone can tell us.