When I want to start Traktor I get the "Loading collection"-box saying "checking consistency". But afterwards the program doesn't start.
The Traktor-tab IS in my taskbar but nothing happens when I click on it; taskmanager says the program is running correctly.
I've deleted and reinstalled but I get the same result.

I don't get it, it has always worked fine, and all of the sudden it doesn't???

Reinstal the OS.
This should work. Or try another version of the program.