Hello, Bofoba
Welcome to the Microsoft Community.
Hello, I'm sorry to hear about your issue, on one of your computers copilot doesn't seem to be working.
Thank you for some of the information you have provided,It's usually something to do with network settings, I would first suggest that you try to reset your computer's network, you can refer to some of the steps below:
A.Reset the network
- Search for CMD, open and find the command prompt (, run in administrator) mode
- In the pop-up command box, enter the following commands (each line after the completion of the run enter the next)
ipconfig /release
ipconfig /renew
ipconfig /flushdns
ipconfig /registerdns
netsh int ip reset
netsh winsock reset
netsh winhttp reset proxy
- Restart the computer to see if the problem can be solved.
B.Reset network settings
Tap windows+R, type inetcpl.cpl, open Internet Options, click Advanced, and tick "Use SSL 3.0", "Use TLS 1.0", "Use TLS 1.1", "Use TLS 1.2", reboot the computer after application to see if the problem can be solved.
C.Reset Proxy Server Settings
Click windows+R, type inetcpl.cpl, open Internet Options, click Connections, click LAN Settings, check whether the Proxy Server column is ticked, if so, uncheck it and click OK, restart your computer after applying it to see if you can solve the problem.
D.Changing DNS
- Click windows+R and type ncpa.cpl. 2.
- Click on the name of the network you are now connected to, open the Network Status window, click Properties, and double-click Internet Protocol version 4 (TCP/IPv4) in the Network Properties window.
- Manually set the DNS servers to "4.2.2.1" and "4.2.2.2" and restart the computer to see if the problem can be solved.
Additionally you can reset your router a bit and that might fix your problem as well.
Thank you for your time and effort in resolving this issue.
Best regards
Bobhe | Microsoft Community Support Specialist