By skyforbes Time to upgrade my computer. On my current system, I am using a retail copy of Win 10 Pro. The new computer I am getting has Win 11 Home. I believe I can upgrade the new system from Win 11 Home to Pro by using the product key from my old system's 10 Pro. If I do that, will Windows 10 Pro deactivate from the old system, or can I still use it? I'll be running both systems on KVM switch until its time to finally rid myself of the older system.