How many times over the years have I recommended, that if there is an unexplained problem, then try re-installing DirectX, then reboot your computer.
Search says the answer is 14.
.... And how many times have I been ridiculed?
I couldn't figure out how to search for that - nor how to search for how many times it has actually worked. And how many times it did not work.
But you're absolutely right that it's worth a try.
Presumably, garybebee will try it and let us know if it's successful in this case.