Hey Friedrich,

I found that this was getting too complicated and decided to play it out a little different with a simple if-else. If %PROGRAMFILESDIR%\GOOGLE\DRIVE\GOOGLEDRIVESYNC.EXE File or Folder Exists then do nothing, else Install File C:\....googledrivesync.exe Feat Always Install.
But this doesn't work...

Here is an image:


I'm going to email/pm you the project so that you can try it out.

Regards,

Alejandro