hey guys i recetly bought a 2nd hand hp probook n the seller forgot to format it so i installed a windows 7 through my cd drive n after some days i thought about to update my laptop to windows 8.1 so i downloaded windows 8.1 iso from torrent n make a usb bootable using refus n search for the solution n i didnt get anything n i forgot to make a backup n formated it n there is no old windows 7