Hi, This error happend when I tried to install nRF51 SDK(nrf51_sdk_v4_3_0_27417.msi). The step is that. First of all I installed keil-MDK4.72 and than I installed JlinkARM4.74, after than I'm to going to install nRF51SDK, than there the prompt of "nRF51 SDK Wizard ended prematurely" is showed on screen. I trid several times, the result is the same. What is wrong with it? Who can tell me ? thank ....