Microsoft Users, Don't Press F1

If you're running any of the older versions of the Windows platform - Windows 2000, XP, or Server 2003 - and you're using Internet Explorer 6,7, or 8, it would be a bad idea to follow any pop-up prompts to press the F1 key.

Microsoft has released Security Advisory 981169 that details a zero-day vulnerability that could allow malicious code to be installed on your PC:

The vulnerability exists in the way that VBScript interacts with Windows Help files when using Internet Explorer. If a malicious Web site displayed a specially crafted dialog box and a user pressed the F1 key, arbitrary code could be executed in the security context of the currently logged-on user.

Sit tight and wait for Redmond to issue a fix. Sound familiar?