Downgrading Windows 10 Enterprise LTSC to Windows 10 Pro is not a supported in-place downgrade path. The safe, reliable approach is a clean installation of Windows 10 Pro after backing up data. There are limited workarounds (changing the product key to a Pro transitional key) that can sometimes change the visible edition, but these are unreliable, often fail to activate, and may leave a system unstable or unsupported. Follow a planned clean-install process if you need Pro.
. Delete your existing partitions (this will erase all data) and select the unallocated space to install Windows 10 Pro. Activation