Hello Nitin Kumar,
Thank you for reaching out to the Microsoft Q&A.
To better understand the issue, we would like to know the following information:
- Could you please tell me exactly when you see this error? For example, does it happen when you try to open the PC Health Check app, sign in to your Microsoft account, or access a specific page?
Meanwhile, please check if your device's internet is working properly and disconnect any VPN connection you have enabled. You can also try connecting your device to a different network, such as a mobile network, and see if you can sign in.
We look forward to your reply.