Hearthstone Deck Tracker is not starting and crashes at startup. How do I fix this?

Do you have Windows Vista or higher and .NET Framework 4.5 or higher? Try reinstalling or repairing your .NET Framework installation.

Have you extracted all the files? Don't start HDT from a zipped folder.

Try reinstalling / updating your graphics card driver

Is there a log entry in the windows event viewer (Windows start menu > control panel > management tool > event viewer > windows log > application)?
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See Problems caused by other programs in combination with HDT