When I go to open a Word document - one I did a while ago, or even one I downloaded lately from an email, something funny happens.

If I double click it, it opens totally blank - not even a white sheet in it. Just the frame, and that slate blue colour.

If I right-click on it and choose "Open", it is fine.

I just started using a wireless mouse recently, but am not sure what that would have to do with it.

Any ideas?

Thanks!