I have a problem that started manifesting itself a week ago. I'm using MS Word 2010 to type a mathematical document (lots of diagrams, images and, of course formulae). I noticed that I was no longer able to select text using "click and drag" with a mouse.
I assumed it was something in the document, but I am able to work on the document without any problems on two other computers running MS Word 2010. I should add that these are "older" machines which makes editing slower, but still possible. I would, however, like to edit on my main machine - the "broken" one.
I attempted an un-install and re-install, but the same behaviour persists. I have also upgraded the offending machine to MS Word 2013 in an effort to see if that makes a difference, but it does not.
If I open ANY document on the "broken" machine, I am able to select and deselect text without a problem. The moment I begin typing, the ability to select text with the mouse breaks.
I can still select things in other programs (e.g. copy and paste from web browsers, using the mouse to select text) so I'm confident it is not a hardware issue. In fact, I've used the same hardware on other machines to check.
I have no idea where to look or what might be the problem. I would be grateful for your suggestions.