Firmware keeps corrupting on windows 7 pc NRF52832 DK pcb 2.0.0/2.1.0 version

I have Windows 7 pc on which PCA10040 DK is used to test UUT.

- Devkit frequently gets corrupted for unknown reason.

-It has custom Firmware which is validated to be working fine at another setup with same versions (It has windows 10).

-Once corrupted, I am able to see the Jlink com port as usual but cannot configure it.

-On nrf Connect when read from the device it only shows MBR or Application(Orange slot) region. { this is read on windows 10 computer because I am not able to find any orking nrf app for windows 7)

-Basically we have to frequently reprogram the devkit in win10 and jump to win7 pc for testing.

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