If you’re still using Windows XP, Microsoft has a piece of security advice for you: don’t hit F1.
A recently discovered vulnerability is disrupting how Windows XP handles VBScripts that are used to load Help files. Hackers could disguise malicious code as a Windows Help file (with the extension “.hlp”), and then launch a pop-up window prompting users to press F1 for help. Pressing F1 would in fact load the malicious file, and execute the code, thus infecting a PC. Fortunately, the vulnerability does require user interaction, so those who refrain from using Help (or who turn it off entirely) will remain safe. Details for how to turn off Help can be found here.
http://www.switched.com/
