Do I have to purchase a new license when replacing the motherboard on my computer?

Replacing the motherboard can require a new Windows license, depending on the license type.

• If Windows was preinstalled by the PC manufacturer as an OEM license, replacing the motherboard is treated as a new device, and a new license is required.
• If the motherboard was replaced by the original hardware manufacturer (OEM), Windows should reactivate automatically. If it does not, use the product key from the COA card if one was provided.
• If there is a retail product key, it can be entered again after the hardware change in Start > Settings > Update & Security > Activation > Change product key.
• If the device used a digital license linked to a Microsoft account, reactivation may be possible through the Activation troubleshooter after the hardware change.

To find the current license or activation method:

1. Open Start > Settings > Update & Security > Activation.
2. Check whether Windows is activated and review the activation details there.
3. If a product key is needed:
   • For a PC bought with Windows preinstalled, the key may be preinstalled, included with packaging, or on a Certificate of Authenticity (COA) attached to the device.
   • If Windows was bought from the Microsoft Store online, the product key is in the confirmation email, and Microsoft keeps a record in Order history.
4. After the motherboard replacement, if Windows is not activated, try:
   • Start > Settings > Update & Security > Activation > Troubleshoot
   • If available, use the option for a recent hardware change.

If activation still fails after a significant hardware change, Microsoft support documentation says to contact customer support.

• Activate Windows
• Using the Windows Activation troubleshooter
• Fix Windows 10 activation error 0x803F7001