After upgrading my Windows from Win 7 64 professional to Win 10 my Lightroom 6 desktop installation is not working any more. It always tells the application manager is damaged. I've already tried deinstallation, rebooting the PC and complete new installation without success. Also manual installation of the application manager did not change anything. Although I've entered my valid serial number during installation, the popup box always says the application manager is needed to start the trial version. My old Lightroom 4.4 is still running well. I only can't start Lightroom 6. Does anybody know a solution for this?