: Try running the installer in compatibility mode for an older version of Windows.
: Some semiconductor manufacturers offer free, full-featured MDK licenses for specific chips, such as STM32F0 and STM32L00;6d4; 0;4a; devices. Official Activation Process keil uvision 5 keygen fix
Simply reinstalling the software usually won't work because the "bad" license data stays in the registry. Uninstall Keil uVision via the Control Panel. : Try running the installer in compatibility mode