Direct uninstallation? I would try a restore of the settings in the first place then a repair of SW if necessary then only an uninstall and then reinstall ... Can you put a copy of the full screen rather than just a small piece?
I think he is the one who created the red circle (just on the screenshot) to show that his mouse pointer is stuck on the dimension mode, I just think it's a shame not to show more so that we can see which mode / menu he is in at the time of the problem, which could guide us to a possible analysis and resolution.
There is a new problem: I am in forced quote mode, under the mouse I have the quote symbol.
When I open a sketch, whatever it is, even if I create a new one, as soon as there is a dimension, it freezes because of this mode that I can't remove.
To answer D.Roger, I tried a repair this morning but it's always the same...
It may be interesting to install a part or you have the problem, if it is a general problem that you had before it happened? Configuration change, updates....