The Wikis and Photo Galleries on this site seem to be having some problems at the moment, and probably have been hacked with a form of malware. I've set up some redirects to try and take the site offline and redirect everything to this Blogger site (which is entirely separate so is not affected) and will try and fix it over the next couple of days
In the meantime, in case the redirects don't cover all the ways in, it may be wisest to avoid accessing the wikis and photo galleries, as there might be something untoward hiding in there somewhere that could disagree with your PC..