Blender does not do anything until i try to do something else (totally terrible title

Ok let me explain better.

I select a vertex, nothing happens, select another vertex, the first one becomes selected.

I select a vertex, nothing happens, I move in 3d space, the vertex gets selected.

its like blender is not updating until i do something that makes it do so.

but this happens for as far as i can see everything. even selecting folders to save the file to i have to double click/do another action to get the action i want to actually appear.

Edit: So far it does not do it when i click check boxes, but does when i click drop down menu’s or places to type in. etc. very bizaarre.

not sure if this is blender or my computer.