Welcome Alex Shaulov
Thank you for reaching out to Microsoft Q&A forum. I am sorry to hear about your issue with black screen when you attempt to share window.
You can try these workaround steps to troubleshoot this issue:
- Verify Your Internet Connection Ensure your network is stable and there are no disruptions in connectivity.
- Enable VPN Turning on a VPN can help bypass regional restrictions and provide broader access. Try setting the VPN location to the United States.
- Switch Browsers Test Copilot on different browsers (Chrome, Edge, Firefox) or use Incognito Mode to see if the problem persists.
- Repair or Reset the Copilot App Go to Windows Settings → Apps → Installed Apps, locate Copilot, and select Repair or Reset under Advanced Options.
- Check for Updates Make sure you have the latest updates installed for both your Office apps and Windows.
- Clear caches
Open Command Prompt and Run as Administrator > type the prompt
ipconfig /flushdns rd /s /q %temp% netsh winsock reset
After that, reset your PC and see if the issue is resolved.
I sincerely apologize for the inconvenience you’re experiencing. Thank you for bringing this to our attention. Please continue to monitor the situation and let us know if the issue persists after trying the suggested steps. I am here to assist you further if needed.
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