Microsoft Edge 109users reported that this update caused Application Guard to crash.

CTOnews.com, January 24, according to foreign media borncity reports, some users reported that the upgrade to Edge 109will lead to the collapse of Microsoft's Application Protection (Application Guard) function.

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For Microsoft Edge, application protection helps to isolate untrusted sites defined by the enterprise, thereby protecting the company when employees browse the Internet.

As a corporate administrator, you need to define what are trusted websites, cloud resources, and internal networks. Everything on your list is considered untrusted.

If an employee accesses an untrusted site through Microsoft Edge or Internet Explorer, Microsoft Edge opens the site in a separate container with Hyper-V enabled.

In the Reddit community, in a "Microsoft Defender Application Guard 22H2 Bug" post, users reported that Application Guard crashed when they tried to open a website in an Edge browser.

Another German user reported to the media that Edge 108 was fine, but upgrading to Edge 109.0.1519.55 would cause Application Guard to crash. He had tested it 52 times in a row, each time it crashed.