I had windows 7 ultimate licensed, which I had upgraded to Windows 10 Pro 3 weeks back. Last week, my house got stuck with lightning and my SMPS and Motherboard both gave up. I just replaced both of them and now I see on the desktop bottom right, it shows, Activate Windows Goto Settings to Activate Windows If I goto system properties, it says, Windows Not activated If I click on activate, it says, try later. Whats wrong ? Why is it again asking to activate, when I already have a licensed version ?