[vbezhenar]

Still it's sign of bad design IMO. Proper design would show menu immediately with some indication that some items are still loading, while running shell extension callbacks in background. But probably that's too fundamental to change at this moment. I remember entire Windows shell freezing because of similar things back in Windows XP. At least now different shell parts don't freeze all at once.

[oblio]

Yeah, and but there are SO many plugin systems designed decades after Explorer that do the same thing. Hindsight is 20/20.