Microsoft Security Bulletin Advance Notification for January 2010
The above bulletin from Microsoft announces that later today they will be releasing an "out-of-band" patch to fix a security hole in Internet Explorer. Preliminary reports state that this patch should be released around 10:00am Pacific time today.
The security hole that this patch addresses is the same hole that was used to hack Google earlier this month. With all the press that this story has received, the exploit has been released to the Internet, and there are already several malicious programs and sites that are using this security hole in an attempt to compromise people's computers.
If you are a PC user, I highly recommend that you run Windows Update (or Microsoft Update) this afternoon and install this critical patch.
About Security Update 2010-001
On the Macintosh front, the above link points to a security bulletin released by Apple that addresses several security holes in OS X. Macintosh users would also be wise to run Software Update today and install any needed patches.
The upshot is, if you're running a Mac or a PC, today is the day to install updates!