There have been some reports across the network from people who have run into virus warnings and/or popups. Apparently it can take the form of a fake antivirus popup (AVG) and attempt to have you download something malicious.
SBN's tech team is working on it to find the problem, but I wanted to check with you guys and make you aware of the problem. We've been told that it happens most commonly to folks using IE and windows. I use a Mac and use google chrome or Firefox and haven't seen anything out of the ordinary. If you've seen anything strange, let me know, and if you can take a screen cap and email it to me (firstname.lastname@example.org) so I can send it along to the tech team.