Microsoft has issued an emergency out-of-band security patch for all versions of Windows, fixing a critical vulnerability that could be exploited by hackers to infect computers with malware.

The danger? Boobytrapped fonts.

Flaws in the way Windows handles TrueType font files and a zero-day flaw found by Google researcher Tavis Ormandy are addressed in Microsoft’s latest Patch Tuesday.

Make sure your computer is properly protected as soon as possible.

How NOT to stop your communications from being spied upon by the authorities.