I got my computer with a 60-day trial of Microsoft Office 2010 installed on it. Once the trial ran out, I bought the product, but in doing so installed a separate application, leaving two Microsoft Office installations, one with an unregistered product key and one registered (yes, I know I was stupid). I uninstalled the old version, leaving no default program to open documents with. I tried to track down the EXEs for each program, no dice. When I looked at the start menu shortcuts, I found that each Microsoft Office program lead to one application, called CVH.exe. Setting that as the default program didn't work.
How can I make it so that I can double-click on a pptx or docx file and run the corresponding application?