Unfortunately, ChessBase 8.0 is not fully compatible with Windows 7 platforms. Even if you can run it on your PC, you will not be able to use all its functions and features. In order to fix it, I suggest you try the Windows 7 Compatibility Mode. Right-click on the ChessBase launcher, select Properties and navigate to the Compatibility tab. Check Run this program in compatibility mode for box, select a compatible platform from the drop-down list and click OK. If this doesn't help, you will need to use ChessBase 11.0 because there isn't an engine file available for downloading. I suggest you contact the developer for further information.