How to install USB bootloader more than One Blue pill?

[PadmaIoT]

Hi,
I am using Arduino IDE for programming BluePill for a long time using serial(FTDI Module), Operating system windows 64bit.
I followed this guy and installed a USB bootloader by STM32CUBEPROGRAMMER and it is still running fine. But the problem happened when I tried to use multiple blue pills, all uploaded the same HID bootloader. My computer only recognizes my 1st blue pill only as a virtual com port. And for the rest of them, it shows in device manager:

unknown USB device (device descriptor request failed)

How to get rid of this situation?
How to create a virtual com port for all of them?

[GonzoG]

They will show as COM ports only if you there is a firmware with VCP on them, so you need to flash any firmware with USB CDC enabled.