There’s a scary new attack targeting Microsoft Office—and worse, it’s not patched yet. But you can keep your computer safe if you don’t click on risky files from untrusted sources. And even if you do by accident, Office’s Protected View feature can save your bacon.

Unfortunately, we all still click on Office documents emailed from “trusted” contacts, so the next line of defense is to make sure Protected View—the prompt that warns you a file originated from someone potentially insecure, requiring you to click a button to start editing it—is switched on in Office 365. It’s normally on by default, but some users may errantly switch it off. If you’re wondering if you have Protected View on, here’s the easy 5-step process to check.

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