Will I be able to continue to play COD on my Computer if I cannot update Windows 10?

Hi,

My name is Igor, it's a pleasure for me to help others and I'll try to help you. I am merely a fellow user trying to provide insight and information that may be helpful to others.

Windows 10 will be still operable as the installed program. The problem will be with security updates only.

But you may install Windows 11 (at your own risk) still, see https://support.microsoft.com/en-us/windows/installing-windows-11-on-devices-that-don-t-meet-minimum-system-requirements-0b2dc4a2-5933-4ad4-9c09-ef0a331518f1

It's always a good idea to keep an eye on Activision's support pages on if it will be necessary to upgrade to Windows 11 or upgrade your PC to continue playing COD. https://support.activision.com/