Windows 7: Microsoft Patch Tuesday for January 2010: one bulletin.

According to the Microsoft Security Response Center, Microsoft will issue a single Security Bulletin on Tuesday, and it will host a webcast to address customer questions about the bulletins the following day (January 13 at 11:00am PST, if you're interested). The vulnerability is rated "Critical" and it earned the rating through a remote code execution impact, meaning a hacker could potentially gain control of an infected machine. The single patch may require a restart.