[Update: Around noon Monday, the Strib took down third-party ads.]

If you're at work and having trouble connecting to Startribune.com, your web adminstrator may have blocked access due to a malware outbreak Sunday.

Odds are you'd know if you were hit; according to University of St. Thomas admins, "an antivirus software advertisement called Antivirus Soft pops up and cannot be closed."

Strib Digital Media executive director Jason Erdahl says that a "remnant ad" contained the malicious software, which can contain viruses and other nastiness.

The ad — a lower-priced type served up by national networks — was pulled as soon as the virus was discovered, but reports of problems were still trickling in Monday, Erdahl says. "There are still reports trickling in this morning, but they seem primarily to be a reaction to Sunday’s outbreak. We are giving this our full attention, however, just in case this is still a problem for our readers."

(MinnPost's Joe Kimball told me around lunchtime a St. Paul fire station was also affected.)

As always, you should have an anti-virus program and if you don't, you might want to try an online scan or this free-to-try anti-malware program. Oh, and block those pop-up windows!