Here is a checklist to identify and resolve the issue:

1. Connect to a different network or turn off the router for 15 seconds and try connecting again.
2. Check your Windows Update version by going to Win + R and then type winver to confirm the update.
3. Update your internet driver from device manufacturer’s website.
4. Perform a clean boot to identify and remove the error-causing program.
5. Uninstall and reinstall the app or web browser, whichever is causing the issue.
6. Reset your internet connection settings using the reset option.

If the issue still persists, contact your system manufacturer for further assistance.