Installed AC17 on Windows 7, with recent hot fix, program will close just after splash screen with an error message "archicad 17.0.0 component has stopped working" I then try in demo mode and same thing. Then I tried to boot in safe mode and start AC17 and it opened, but it took about two minutes. I then close program, boot in normal mode and start program and all works fine. When I close the program and try and reopen it I get the same error message. So the only time I can get it to run is boot in safe mode, open program, close program, boot in regular mode then open program. I have also updated to the latest QuickTime. And FYI it does the same thing on two Windows 7 machines.