If something went wrong during installation (for example you've installed software without providing administrative rights) you may observer following behaviour: black window blinks for less than a second and disappear. 


This may happen due to PowerShell Execution Policy misconfiguration. To allow execution of the scripts please follow this steps:

  1. Press Win-R, type «cmd» and hit Enter
  2. Type «powershell» and hit Enter
  3. Type «Set-ExecutionPolicy RemoteSigned» and hit Enter
  4. Type «Y» and hit Enter (this step may be optional for some systems)


This steps should fix PowerShell permissions and black window should not blink any more.