Hi there! I understand you're having trouble with the Drive Safe & Save app not showing a prompt to register your sensor. Just to make sure I get the full picture—could you tell me if you've already installed the app and logged into your account? Also, is the sensor the physical device you received for tracking driving, or is it a feature within the app?

Usually, the registration prompt appears once the app detects the sensor via Bluetooth. But sometimes, it might require a manual step or app update. Have you checked whether Bluetooth is enabled on your Windows 10 device and the sensor is powered on?

Here’s a step-by-step approach we can try:

1. Check Bluetooth Settings:
- On your Windows 10 device, open Settings > Devices > Bluetooth & other devices.
- Make sure Bluetooth is turned on.
- Look for your Drive Safe & Save sensor in the list of paired devices. If it’s not there, the app might not detect the sensor.

2. Update/Reinstall the Drive Safe & Save App:
- Make sure you’re running the latest version of the app. Sometimes the registration prompt might not appear due to app bugs fixed in updates.
- If possible, uninstall and reinstall the app to refresh its setup.

3. Restart your Device and Sensor:
- A simple reboot of your Windows device and power cycle of the sensor sometimes triggers detection.

4. Manual Sensor Registration within the App:
- Open the app and navigate to the Safe & Save tab or settings area where sensors might be registered. Some versions allow manual addition.
- If you don't see this option, the app might only prompt automatically when it detects the sensor.

5. Check Account and Vehicle Eligibility:
- Ensure you are signed into the app with the correct State Farm account associated with your eligible insurance policy.
- The sensor registration might not appear if your vehicle isn't linked or eligible.

If these steps don’t bring up the registration prompt, it could be a specific app or account issue. At that point, contacting State Farm support for Drive Safe & Save directly can provide tailored assistance.

Would you like me to guide you through any of these steps, or did you already try some of them? That way I can assist better!