Retrieving windows 8 from a windows 10
My boss gave his laptop (TOSHIBA) to be repaired. He said that it was formatted and installed windows 10. However, he doesn't like the functions of windows 10, so he wants me to recover it to windows 8. When I used Hirens, it only recovers data, but it cannot recover the windows 8 operating system. Can anyone advise me what to do. Should I format it to windows 8?