unable to flash code on nRF52840 DK

[azwin]

hi , we have a nRF52840 DK when connected to PC via J-link there LED5 blinks . when i try to flash the code  using Kiel IDE 

get this error 

 

using nRF connect the device gets identified ,but the error is seen in below Fig:

 

how can i get this DK -52840 working . thank you 

[Øyvind]

Hello, 

Windows 7 is no longer supported: End Of Life January 14, 2020

Kind regards,
Øyvind