I reset my Windows 10 system using the built-in method. Everything ran fine, the 4GB update went fine, I installed some software... then the next time I went to start it up, I got "no internet connection" over WiFi.

In order to run the netsh commands to get it back, I have to alter the permissions for
\HKEY_LOCAL_MACHINE\SYSTEM\CurrentContsolSet\Control\Nsi\{eb004a00-9b1a-11d4-9123-0050047759bc}\26 setting FullControl for Everybody.

After that, NETSH runs fine:
NETSH int ipv4 reset reset.log
But once I reboot, I still have no internet connection, the permission flag had been toggled off again, and running NETSH results in another access denied message.

Somehow the internet connection did drift back somehow, but then went away again with the same situation I'm at now.

Other stuff: running CMD in admin mode. WiFi works for all other devices. Reboot router and modem.

Thanks for any help!