Hi, DN,
Sorry to hear you're experiencing this issue.
It could be a problem with updates that weren't finished correctly or a problem with your network driver that is outdated and not compatible with Windows 11. In this case, the best option restore your computer to a previous point before the update.
Option 1: System Restore
1-Restart your computer while holding the SHIFT button
2-The Advanced Startup menu will open on the boot.
3-Go to Troubleshoot.
4-Now, go to Advanced Options > System restore
5-Select a restore point and click on next to restore
Option 2: Uninstall the recent updates installed
1-Restart your computer while holding the SHIFT button
2-The Advanced Startup menu will open on the boot.
3-Go to Troubleshoot.
4-Now, go to Advanced Options > Uninstall Updates
5-Click on Uninstall the latest quality update and then click Uninstall quality update on the next screen.
When finished, go to your laptop manufacturer's website and make sure all your drivers are updated before updating to Windows 11 again.
If you cannot find the correct drivers for your laptop, provide the full model of your laptop and screenshot of the system information and I'll be glad to help you find the correct driver.
1-Right-click on Start then click on Run
2-Type: msinfo32 and click on OK
I hope this information helps. If you have any questions, please let me know and I'll be glad to assist you further.