sassars virus was bad there a new one out [Bobax Worm] it even badder then that one if you did not get your windows/OS patched you lose in the end new virus will:
Damages:
Bobax.D worm. The fourth in the family, Bobaxuses the same LSASS vulnerability that the Sasser family did. It hasn't had a Sasser-sized impact, but it has the potential (if Sasser doesn't infect the un-patched systems first). Bobax is a little more dangerous than Sasser,
as it deletes and changes system files, and sets up an open e-mail relay to send spam from a victim's machine. It even checks the speed of the victim's connection, presumably to cherry-pick the best spam-sending systems. See our Top Threat for more information.
pcmag.com New's release:
http://www.pcmag.com/article2/0,1759,1600125,00.asp
Sasser virus was a baby to this one Bobax.D worm