You must be running IE and hit an activex exploit somewhere or something. (System restore is a bad policy in general as it can store viruses an trojans for you to restore
)
I am on Dynaverse.net all day most days and have not had any problems. I can shut the server down for a full virus scan at some point, but I'm pretty sure it will come up empty as usual.
How do you know it was that prompt you saw that crippled your system, and what makes you think it came from Dynaverse.net? (not trying to be a dink here, just wanting to get to the bottom of this...)