That annoyed me too, Terry. You have two choices - leave your pc on and wait until tomorrow , or - I refer the honourable gentleman to the reply I made a few posts ago.
Haha honourable gentleman!
I opted for the upgrade when it first appeared - and my Win 7 machine is still not asking me to upgrade...not that I want to yet on that until I have checked it out on the lappy
Mine is 8.1 and it wasn't asking me to reserve with the get windows 10 app in the toolbar. I ran windows update to install a load of non essential updates (mine is set to only install important updates automatically) and after that it appeared and I've reserved it. Shall leave my laptop on all day in the hope it downloads windows 10.