I'm having this problem too. I got Archicad 13 to install just fine and working on one computer but then try to install on another and get this message. I've uninstalled 13 and quicktime completely and then reinstalled them..restarted the computer and STILL get this message.
Here is Archicad Wikis solution (didn't work either):
1. If QuickTime was not updated during installation, browse the ArchiCAD 13 installation DVD for the "QuickTime" folder and run the installer.
2. Browse the ArchiCAD 13 installation DVD for the "SUPPORT" folder and run "GSQtComInstaller.exe".
3. If ArchiCAD still won't start, run the vcredist installers ("vcredist_x86.exe", "vcredist_x64.exe"), also from the "SUPPORT" folder.
I needed 13 up and running 2 hours ago! Someone help please.
WAIT lol...didn't see these solutions below dangit. let yall know if it works lol.