nRF51 DK does not go in to bootloader mode

[pltv]

I have tried a lot but my DK wont enter in Bootloader mode, or atleast the Bootloader folder does not show up in my Windows 7 machine. I am able to do that comfortably with the other DK board i have. Should i assume that the board is broken?

[Vidar Berg]

I haven't seen this before, and a bit puzzling considering that your other board(s) works on with the same setup. Do you happen to have a different PC setup that you can try with?