Do not click another link until you go to the Start menu and click on Windows Update. Microsoft admits to 19 vulnerabilities, with a MSBlast-Level Worm likely. The company released its largest group of security patches in nearly a year, posting 12 security bulletins encompassing 19 vulnerabilities, 14 of which it marked “Critical.” Among them is a vulnerability that one security vendor claims will likely lead to the biggest, baddest worm since mid-2003. SMB is the standard protocol that Windows uses to share files, printers, and serial ports, and to communicate between computers, particularly between servers and client desktops. A specially-crafted SMB packet sent to a vulnerable PC could, said Microsoft, let an attacker “take complete control of the affected system.”