Hi there! I understand you're having trouble logging in and paying bills through the Prosperity app. To help you better, could you please tell me a bit more? For example:

- Are you receiving any error messages when you try to log in?
- Are you using the mobile app or logging in via a web browser on your Windows 10 device?
- Have you successfully logged in before on this device, or is this your first time?
- Have you tried resetting your password or any other steps so far?

This will help me guide you through the easiest way to get you back into your account and paying bills smoothly. Meanwhile, I checked and there are no widespread reports of Prosperity Bank outages right now, so it seems to be an isolated issue1.

Could you share those details? Then we can proceed step-by-step from there.

Are you using the mobile app or logging in via a web browser on your Windows 10 device? yes

Thanks for confirming you're using a Windows 10 device and logging in either via a mobile app or web browser. Prosperity Bank primarily uses their Secure Browser for safe access to online banking on Windows. This special browser ensures your transactions are protected while using their Treasury Center online platform1.

Here’s what I recommend first to help resolve your login and bill pay issue:

1. Check if you are using the Secure Browser: If you are accessing Prosperity via a regular web browser (like Chrome or Edge), try downloading and installing Prosperity's Secure Browser for Windows 10. That may solve security-related login problems right away.

2. If you are using a mobile app: Prosperity Bank does not officially provide a Windows 10 mobile app. Confirm that you are using the correct Prosperity app on a supported device, or you may want to use their Secure Browser on your Windows device instead.

3. Password and Account Verification: If you have confirmed you are using the correct portal/app, try resetting your password just in case. Also, ensure your account is not locked or requires any additional verification.

4. Clear browser cache/cookies: If using a web browser, clear the cache and cookies to avoid stored error data affecting login.

5. Try a different device or network: See if logging in from another device or internet network works, to rule out device or connectivity issues.

If after these steps you still can’t log in or pay bills, please let me know exactly what happens during login so I can help troubleshoot more deeply or assist you with next steps like contacting support directly.

Are you currently using the Secure Browser for Windows or just a regular web browser? That info will help me tailor the next steps!