Hi Santosh Pati,
Welcome to Microsoft Q&A!
I understand how frustrating it is to lose network of all types, especially when the issue started after an Insider update. This might be specific to preview builds and not have an immediate fix, but there are things worth trying:
1 - Network reset
- Open Settings > Network & Internet > Status
- Click Network reset > Restart your PC after reset
2 - Check Wi‑Fi security mismatch
- Settings > Network & Internet > Wi‑Fi > Hardware properties
- If security shows WPA3, change router or reconnect using WPA2
3 - Leave the Windows Insider Program
- Check to see if you can uninstall latest update first:
- Open Settings > Windows Update > Update history
- Open Uninstall updates > Try to uninstall the latest
- If it’s not available, go back and open Windows Insider Program
- Choose Stop getting preview builds > Reinstall your system
- Refer to Leave the Windows Insider Program
When connectivity is broken immediately after an Insider update, clean‑installing stable Windows 11 is the supported resolution path. You should not need your old Windows 8 media if logged in correctly - your system has a digital license already activated through the upgrade.
Since Insider Preview builds are testing versions of Windows, driver or network instabilities are possible. Send feedback to the team if you believe this is a build-regression and need to be addressed!
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