See? The science of Astrology explains it all!
Are there any Windows Administrators out there with I.Q.'s > 90 that knowingly and intentionally leave ports 137, 138, 139 and/or 445 open to the Intartubes?
Sorta like global warming is supposed to be nowadays. I'm pretty sure we've contributed, but I'm not so sure we caused it . . . what I do know is that we should consider adapting - quickly.
On the other hand, this would be a perfect thread for somebody to tell us about the many and wondrous benefits of using hostfiles instead of some insane and newfangled name service thingie.