I downloaded w10 through Get Windows 10 and installed in my laptop with Old Windows 7 , 64 bit, unfortunately it damaged entire system and while installing I got a message that OS is missing. So again I reinstalled Windows 7 with my orignial DVD.
this hAPPENDED TWO TIMES. SO I AM FEARED TO INSTALL WINDOWS 10. SO KINDLY HELP IN THIS REGARD TO UPDATE W 10. DO WE NEED TO SAVE THE UPDATES OF W10 IN FLASH DRIVE.