Welcome to the Raspberry Pi forums.
Ajay Jassal wrote: ↑Thu Oct 31, 2019 10:01 am
how i install window 10 iot core in rpi4. share the link from where i can download w10 iot core.
Visit the official Raspberry Pi downloads site at
https://www.raspberrypi.org/downloads/
Click on the blue Windows 10 IoT core icon under the Third Party Operating System Images heading.
Then carefully read the information from MicroSoft to see whether they have released a version of their image that supports the Raspberry Pi 4B.