I need to start a process from a powershell script and pass such params : -a -s f1d:\\some directory\\with blanks in a path\\file.iss to do that, I write the folowing code :
I think you can use Start-Process:
Start-Process
Start-Process -FilePath $setupFilePath -ArgumentList '-a','-s','-f1"d:\some directory\with blanks in a path\fileVCCS.iss"' | Wait-Process