Win 10 license

tried in on a legit Win8.1 laptop. Upgraded fine except the 8.1 key was not accepted. Had to resort to the web to get an 8.1 key and now the Win10 is asking me to activate with nag text in lower right corner. Kinda figured it would go this way...

My Super at work claims he's been using "nagger" W10 for months. Evidently it keeps working, just nags you??