windows 7 or windows 8.1 also look at https://forums.mydigitallife.net/th...g-through-the-complete-upgrade-process.64770/ Closing discussion here this is bios mods.
The SLIC method does not work with Windows 8 client or later. There's no such method to activate Windows 8/8.1 or Windows 10 by SLIC method. The SLIC method is intend to activate the Windows 8 server (Windows Server 2012) or later only.