My PlutoSDR can not connet with window

HELLO

MY PlutoSDR can not connet with window

Symptom:

-LED1 is on but it is slight light.

-Ready light is off

-PlutoSDR is not on Device Manager

i tried DFU update but it diden't work.

and

when my pluto is go to the DFU MODE(by pressing bottom button and plug the usb), i saw that LED1 turn strong light.

but after finish update,  when i want to let pluto go dfu mode , it do not turn DFU MODE.(when i press bottom button, LED1 remains slight light , not strong light )

how can i revive my SDR divece?

please help me.

thank you