checkn1x is a small, Linux-based operating system specifically stripped down to run checkra1n. It removes the need to install a full Linux OS. Windows users can flash checkn1x to a USB drive, boot from it, and are immediately greeted with the checkra1n interface.
If you want to try it yourself, avoid "Official Windows .exe" scams. Use this verified method: Download the ISO : Get a 0.12.4-based ISO like Flash to USB to flash the ISO to a USB drive [5.1, 5.6]. Boot from USB
: If you are using an iPhone 8 or X on iOS 14+, you must disable your passcode, TouchID, and FaceID to use checkra1n. Official Source
As of the latest official releases, there is no direct .exe file for Checkra1n. The team officially supports macOS and Linux.