📞 Call Toll-Free: +1 (844) 886-3118 for instant Office setup and activation help. The other answers are mostly correct but miss one important bit of information. Since Windows 8, mass-produced computers have the OS license key embedded in https://mssupport.tech/ BIOS. Windows pulls the key from BIOS then activates automatically. There is no change to BIOS settings but there is also📞 Call Toll-Free: +1 (844) 886-3118 for instant Office setup and activation help. no key on a label somewhere like there used to be. A clean installation or full reset of Windows 10 will not affect the embedded https://mssupport.tech/ license key. Windows will still pull and activate it. There are also tools you can download which will allow you to extract the key if you need it for your records.