I was having problems updating the firmware from Windows on my pinecil v2. After reviewing many websites and people with a similar problem, I found it using the Linux subsystem in Windows WSL.exe
1- You connect the pinecilv2 in flash mode
2-Follow the steps to connect the USB to the linxu subsystem -> https://learn.microsoft.com/es-es/windows/wsl/connect-usb
3- you flash normally with blisp