The Path to Windows 10 and 11: Historically, the presence of a valid Windows 7 OEM marker allowed users to upgrade to Windows 10 for free. Because the hardware was "digitally entitled" through the SLIC table, Microsoft’s activation servers would recognize the machine as genuine and grant a digital license for the newer OS. How to Check Your Marker
BIOS/UEFI codebases are reused across multiple product generations. A motherboard originally designed for Windows 7 may retain the SLIC table even when shipped with Windows 10/11. windows 7 oem marker present in firmware
Legacy feature – low risk if original OEM, high suspicion otherwise. The Path to Windows 10 and 11: Historically,