Hello and welcome to the forum.
That would seem to be a pretty unique problem.
Do you have issues when you use the "right click" anywhere else.... desktop, taskbar, start button??
Is this an issue solely with your user account? Have you tried as another user?
Have you tried Safe Mode to see if the problem persists?
Are you OR have you in the past used any of the multitude of third party software products for adding and or subtracting items from the context menu(s)??
When it freezes, do you actually see a context menu?
Does it ever unfreeze or do you have to restart explorer?