Microsoft Word 2007 Acts Funky

My laptop has Office 2007 on Vista (let’s not argue about Vista or why it’s on my laptop). I used Word without a problem and the next day, it started misbehaving. First, it wouldn’t recognize the mouse. Then it wouldn’t let me select other tabs in Options even using the keyboard.
Naturally, I went to Microsoft’s Knowledge Base (KB) and originally found no solution. So I posted a question in their forums after verifying no one else asked the same thing.
Frustrated and in need of using Word on the laptop, I went back to KB and found the answer. When you enter keywords into the KB, it lists a few possibilities. I didn’t see this list originally, but found exactly what I needed this time selecting “word 2007 vista mouse.”
I didn’t think to use “mouse” since Word had other problems besides the mouse. Anyway, here’s the KB that resolved the problem. I noticed my laptop received updates overnight and rebooted. But I couldn’t imagine it breaking Word and nothing else (should’ve known better, eh?).
Of course, be careful when messing with the registry. Deleting one item in the registry did the trick. Hope this saves someone prolonged frustration.