I'd guess you have a bad installation. Can you do a 'windows'+tab to see if there are messages hidden that might be asking you a question?
This has happened to me once before. I had no time to sort out why. I ended up backing up the binary files, uninstalled PCB services. Rebooted the computer. Installed the new version of PCB Services and then it worked fine. It was still a bit slow, but it finished the installation
thank you for your solution markus...