Try this in order:
- Verify the feature requirements first:
- PC must be running Windows 11 or later.
- Phone must be running Android 10 or later.
- Link to Windows must be version 1.24022.0 or later.
- Turn the feature on again from Windows:
- Open Settings.
- Go to Bluetooth & devices.
- Select Mobile devices.
- Select Manage devices.
- Under the linked phone, turn on Use as connected camera.
- If it turns off again, check camera permission on the phone:
- On the phone, open Settings.
- Find Link to Windows in the apps list.
- Make sure Camera permission is turned on.
- If the permission prompt does not appear on the phone:
- Check the PC taskbar for a new window with a camera icon.
- That window should show the phone name and guide the next steps.
- If the stream does not resume automatically, use the refresh button in that window.
- Update both apps:
- On the phone: open Link to Windows > Settings > About Link to Windows > Check for updates.
- On the PC: open Phone Link > Settings > General > expand the version area > Check for updates.
- Re-link the phone and PC, since this started after the PC reset:
- On the phone: open Link to Windows > tap the Microsoft account under Linked Account > Account Settings > Sign out and unlink account > confirm Unlink.
- On the PC: open Phone Link > Settings > Devices > Add new device.
- Complete pairing again.
- If Phone Link shows a QR reconnection prompt:
- Open the phone camera.
- Scan the QR code shown in Phone Link on the PC.
- Follow the prompts on both devices.
- If needed, select the refresh button next to the connection status in Phone Link.
- Check common connection blockers:
- Make sure both apps use the same Microsoft account.
- Make sure Battery saver is off on both PC and phone.
- Make sure the phone has an active Wi-Fi connection.
- On Android, turn off battery optimization for Link to Windows:
- Settings > Apps & notifications > App info > Link to Windows > Advanced > Battery > Manage Battery Usage > Battery optimization > set Link to Windows to Don't optimize.
- On some devices: Settings > Apps > Link to Windows > Battery > Optimize battery usage > choose All > find Link to Windows > turn it Off.
- On the PC, make sure Phone Link can keep running:
- Open Start > Settings > Privacy > Background apps.
- Make sure Phone Link is enabled.
- Then go to Settings > System > Shared experiences.
- If Fix now appears under Accounts, select it and complete the steps.
- If the problem started after Android permission issues:
- On the phone, open Settings > search App Info > See all apps > Link to Windows > Permissions.
- Allow these permissions if shown: Storage, Contacts, SMS, Phone.
If the toggle still switches itself off after all of that, send feedback from:
- Phone Link on PC > Settings > Feedback & Community > Send feedback
- or Link to Windows on Android > Settings > Provide Feedback
References: