If you want a completely fresh kernel and system files without losing your apps and documents, an "In-Place Upgrade" is the best method. This acts as a complete kernel download and reinstall.
While the Windows 10 kernel source code is generally private and proprietary, developers and researchers can access specific tools to interact with it. Download Windows 10 Disc Image (ISO File) kernel os windows 10 download
If you intended to download the standard, official version of Windows 10 provided by Microsoft, you should avoid third-party "Kernel" mods and use official channels. If you want a completely fresh kernel and
: Note that Windows 10 reached its official end of support on October 14, 2025. 3. Kernel Development & Drivers 2025. 3. Kernel Development & Drivers