A word of caution: Microsoft has issued a warning on an unpatched vulnerability that could affect users of Windows 2000, Windows XP, and Windows Server 2003, running Internet Explorer.

“The vulnerability exists in the way that VBScript interacts with Windows Help files when using Internet Explorer,” the security advisory reads. “If a malicious Web site displayed a specially crafted dialog box and a user pressed the F1 key, arbitrary code could be executed…”

What does that mean for you? Be on the safe side and avoid any prompts by websites that ask you to hit the F1 key. Read the full Microsoft Security Advisory that was issued late yesterday for more details.