I have finished the installation, it take more than four hours. why is it so slow? 

I have not gotten an error message, but I have waited for the installation to continue for half of an hour, it still be there. 

I'm using energy profiler at simplicity studio 4 .but it work bad. It is easy to hang up and can't be resume. when it is hang up ,I can't close simplicty studio 4 too. I must use task-manager of win 10 to close simplicty studio 4 . only I close simplicty studio 4 and open it , and open energy profiler, energy profiler can be use again. what reason?

I'm using Simplicity studio 5 . and I use "installation manager/install by connecting devices" to get tool which I want。 My SDK is EFR32xG22 2.4 GHz 6 dBm RB, WSTK Mainboard , system is win10 64bit  .  when I started installation, it worked for a few minutes ,then it stopped at "Installing com.silabs.sdk.gecko_platform.v3.1.feature.feature.group" and can't continue. why?