After the installation is complete, Windows 10 will automatically be activated online. To check activation status in Windows 10, select the Start button, then select Settings > Update & security > Activation.
Hi All, I've built an image with Image Assist using a new Dell OS recovery ISO for windows 10 pro. After installing the test image on a Optiplex 7050 everything looks okay but under Windows Activation I'm getting the "Connect to the Internet to activate Windows" message. The Optiplex 7050 I think is one of the newest models and only ships with Win 10 pro. I have also downloaded and installed the Win 10 pro ISO for that service tag and I still get the same "Connect to the Internet to activate Windows" message.  Am I doing something wrong, did the OEM windows 10 activation change? This was not a problem with Win 7 pro. Any help here great, Thanks  
Windows 10 OEM activation