The site is not infected, the problem comes from the templates and SEO. I found out that all Artisteer created templates gives the same error. I set back to beez template and no problem anymore.

Perhaps also other templates will mess up avast.

But anyway there is a problem with avast, because since 1-2 weeks I get also problems with sending e-mails but only if the clients provider is Swisscom. I cut of Avast or install anivir, avg or else the problem disapear.

Kind regards