I recently had a long meeting at work because our CIO discovered that his computer hasn't had a defender signature update in over five days, and he's behind compared to the rest of our organization. He's insisting that we come up with a new method to ensure that all our devices are updated within a day, or we might have to look for new antivirus solutions. I'm curious about what other organizations consider best practices for managing AV signature updates. What is a reasonable goal for keeping 90% of devices within a certain number of versions out of date?
4 Answers
We rely on auto-updates across all devices; no one has time to approve those one by one! But sometimes users just don’t keep their computers on long enough to download the updates, leading to compliance warnings from Microsoft. We encourage everyone to turn their machines on at least briefly while grabbing coffee to help with that.
It sounds like the real issue is figuring out why this one PC fell behind. Typically, antivirus should update on its own whenever new signatures are released. If you’re having to manually whitelist updates, that could lead to problems. Instead of overhauling the whole process, maybe focus on investigating this specific instance to see if there's a deeper issue that needs addressing.
You’ll never truly match the speed of Defender’s signature updates if everything is configured correctly. There are so many variables at play—like internet issues or devices being turned off—that you can’t guarantee signatures install every time. We’ve set up four staggered update rings that ensure we’re patched on average within a day and a half after the signature update releases. Defining a threshold is key; something like ensuring 90% of devices have the latest signatures within a day is a solid goal to work towards.
In our setup, we don't micromanage updates. They roll out automatically as soon as they're available. If there's a glitch in a bad update, we can always blame the vendor. But being behind on updates by days? That’s on you. It's a risk you take when not updating regularly.

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