My PC orignally came with windows 7 pre installed on it... i upgraded to windows 10 Educational and its been more then 30 days since the upgrade. i want to go back to windows 7 so i went to microsofts website to download a copy of windows 7 and put in the product key from the sticker off the bottom of my PC
after hitting validate i get the following error
the product key you entered appears to be for software pre-installed by the device manufacturer. please contact the device manufacturer for software recovery options
how can i go back to what was pre installed on my PC without having to buy a copy of windows 7?