A 25-character key product or digital license will be required for activation of Windows 10 and Windows 11 depending on the way you got the license. Windows 10 or Windows 11 activation is done using a digital license. It's sometimes referred to as the "digital entitlement" within Windows 10 Version 1511. The method doesn't need a product code. Without one of them licenses, you will not be able to make your device active. In case where you prefer a full report about cheap software keys, browse around here.