Make a Windows 10 recovery USB stick on another PC (or order one from HP or Microsoft) then boot that USB stick. You will see an option to factory restore the PC and then create new accounts and such. This time, make a backup Admin account so you don't get locked out.
i get free install of windows 10 over my original Win7 on HP625 laptop, i took my old HP pavilion and connect to other HP625 i needed pavilion for more memory and manipulation all going smooth i get even connetion to free use 3Ds printers and on my system info is Windows 10PRO but i must to rearange system and now i was more than month in hospital over robbery where was taken my phone with nomber i lost aacces to Faebook i deactivate myself becouse i cant log in. NOW MY BIGGEST ISSUS HOW TO LOGIN TO MY HP625 i have optinons between my name and game alias but when ome on on-sreen keyboard system getting lo9cked and restart spining outnumberus time