The Windows implementation of checkm8 is tricky: It requires raw USB control, precise timing, and often a dedicated libusbK or WinUSB driver for the Apple device in DFU mode.
The "Pwned DFU Tool" is not a single universal program, but usually refers to a set of scripts or utilities that leverage the bootrom exploit (affecting A5–A11 devices: iPhone 4s to X). On Windows, the most common implementations are: Pwned Dfu Tool Windows
: Fix deep software issues that standard Recovery Mode cannot. The Windows implementation of checkm8 is tricky: It
Most Windows tools require your device to be in standard DFU mode first. [Discussion] can someone explain how PWNED DFU works? Pwned Dfu Tool Windows
You should see PWND: YES or similar output.