After the Windows 11 25H2 update, I can t use any internet-connected software other than the browser

After updating to Windows 10 version 25H2, the system indicates that the network connection is working normally, but only the browser can access the internet; all other software that requires an internet connection is unusable. A technician came to troubleshoot the issue and ruled out problems with the Ethernet cable and the external network, concluding that it is a system failure. I have tried running System Restore, but it did not resolve the issue. Is this a problem with the 25H2 update? How can I fix it?