Followed instructions to download blackmagic to blue pill:

• Hook up an UART adapter to Bluepill (A9 - RX pin, A10 - TX pin).
• Set Bluepill jumpers to the bootloader mode (BOOT0 jumper=1, BOOT1 jumper=0).
• Plug in UART adapter to the computer. Run "STM32 Flash loader demonstrator".
• Download to device blackmagic_dfu.bin at offset 0x8000000 with "Global Erase" option. < verified
• Download to device blackmagic.bin at offset 0x8002000 with "Erase necessary pages" option. < verified
• Put Bluepill jumpers back to the operational mode (BOOT0 jumper=0, BOOT1 jumper=0).
• Using Zadig after that to attempt to install libusb-win32 fails. < FAILS

When plugging back in the Bluepill windows no longer recognizes the device.

Attempting to install libusb-win32 drivers to the device with zadig fails as well.

This happened on 2 blue-pills.

Plugging in the blue-pills before attempting this process showed up on windows as STM32X device and the fact that UART was successful tells me it's unlikely the Dataline resistor is at fault here. Not sure what to do at this point