Forum Discussion
Web Protection in Defender on Android v17 (Samsung S25) keeps switching off
I have read through the support page (https://support.microsoft.com/en-us/defender/web-protection-keeps-turning-off-on-my-android-device#bkmk_device-specific)
However the page only covers Samsung with Android v13 and the solution does NOT work on my Samsung S25 with Android v17 (and One UI v9.0)
Another issue is that in “Never Sleeping apps” only 19 Apps are shown that can be added and Microsoft Defender is not listed and therefore cannot be added to the “Never sleeping app“ list.
Manage app if unused is OFF and greyed out so cannot be changed.
Adaptive Battery is OFF
Power Saving is OFF
Android Version 17
One UI Version: 9.0
Android security patch level: 5 October 2026
Microsoft Defender Version 1.0.9428.0102
1 Reply
You have already disabled several battery-saving features, and Defender’s absence from Never sleeping apps means the Android 13 walkthrough does not map cleanly to your S25. The important diagnostic is whether Android revokes Defender’s Accessibility permission when web protection stops. Microsoft documents that permission as essential to Android web protection and identifies background app termination as one possible trigger. Immediately after the next failure, check Defender’s Accessibility service and its own warning, then note whether reopening Defender restores protection. In the app’s information/battery settings, check unrestricted battery use and background activity if those controls are available; I cannot confirm their exact One UI 9 location from Microsoft’s published instructions. Do not assume the greyed-out unused-app setting is the cause when it is already off. Send Microsoft support your existing version details, failure time and before/after permission screenshots, and ask Samsung for the equivalent per-app background controls on One UI 9.
