Hi! I see you're encountering a "Bad Certificate" error with the HDFC Securities InvestRight app. Let's get this sorted out for you. To understand better, could you tell me when exactly this error appears? For example, is it while logging in, during a transaction, or at app startup?

Meanwhile, here’s a step-by-step approach to resolving a typical bad certificate issue:

1. Check Date & Time Settings: Ensure your Windows 10 system date and time are accurate. SSL certificates rely on correct date/time to verify validity. An incorrect clock can cause certificate errors.

2. Clear Browser Cache & Cookies: Since you’re using WebKit-based browser, clearing cache might help refresh the certificate info.

3. Update Your App: If you are using the InvestRight app on your browser or desktop, make sure it’s updated to the latest version. An outdated app might trigger certificate validation failures.

4. Network Issues: Sometimes, a network or firewall can interfere with SSL verification. Try switching to a different network (like a mobile hotspot) to see if the error persists.

5. Trusted Certificates: The error could occur if your device doesn’t trust the certificate issuer. Windows Update generally takes care of updating trusted certificate stores, so ensure Windows Updates are current.

If you have tried some of these already, please share which ones, so I can guide you more deeply—perhaps checking certificate details or app logs.

Would you like me to walk you through any of these steps, or do you have additional details about the error?