Comment 13 for bug 1864188

Is there a way to install the iwlwifi drivers again to enable wifi? this is the only source of internet.

I have also experienced the same problem after installing 'ubuntu-19.10-desktop-amd64' on a new Dell Inspiron 5491 to dual boot with the default Windows 10 that comes with the laptop. Initially I tried to install 'ubuntu-18.04.4-desktop-amd64' during each installation the installer recognized and used the WiFi each time, however, after updating Ubuntu and rebooting, this resulted in the "No WiFi Adapter Found" problem. Th same problem I am currently experiencing on ubuntu-19.10. However, for ubuntu19.10 since I requested to get updates to the os during installation, the update may have caused the above bug with exactly the same outputs show about.