Hi Bredan Merna,
Thank you for your information.
If you are using the on board debugger, please also use the newest JLINK firmware which can be downloaded from this link:
SEGGER - The Embedded Experts - Downloads
You can find a win7 system, and copy the newest JLINK firmware to your board, the detail step is:
1. power off the board, press the reset button and hold on it, then power on your board.
You will find your board is a device named as"BOOTLOADER", release the reset button.
2. Send "01_OpenSDA_FRDM-K22F.bin" to your "BOOTLOADER", and wait the sending is finish.
3. Power off the board, and power on the board again.
Now, change the board to your win10 PC, and try again.
Wish it helps you!
Have a great day,
Kerry
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