After trying to do some profiling (C++), i noticed lots of things are broken for me:
Debug / Performance Profiler → does nothing
Debug / Windows / Show Diagnostic Tools → does nothing, not opening the window showing CPU and memory utilization.
Help / Check for Updates → shows a window listing command line parameters for vs_installer.exe. I can only close the window but can't do any update.
Running vs_community.exe i can not update either, probably because of this shown error:

I assume the error is because i tried to download VS files to HD and install from there, instead downloading everything again and …