Microsoft Defender Application Guard is an advanced security software designed to protect your device from potential threats posed by untrusted websites. Operating with Microsoft Edge, it directs these suspicious sites to open within an isolated browsing window, effectively safeguarding your device and data. This innovative solution employs hardware-based isolation to segregate these websites within a secure, lightweight container that is detached from the main operating system using Hyper-V virtualization technology. If an untrusted site is found malicious, it remains confined within this secure container preventing any potential harm to the device. The companion app boosts browser security ensuring that websites of doubtful integrity open safely within this isolated environment. Importantly, this companion application extends the security benefit of Microsoft Defender Application Guard to browsers other than Microsoft Edge indicating its wider compatibility and usefulness.