This seems to be a common issue from what I detect in Internet forum postings, but no one has provided a valid solution.
The end-user installed Office 2013 64-bit on Windows 7 Pro 64-bit. After using it for over a month (this now falls outside of the system restore window), the user realizes that the 64-bit version of Office does not work with QuickBooks. So I login and uninstall the 64-bit version of Office 2013 and install the 32-bit version. This resolves the QuickBooks integration issue and everything seems to pick back up where it left off, as expected. However, here is the known issue for people who go through this process. If the user has the preview pane enabled in Windows, then single clicks to highlight an Office word document, they receive the following error. "sorry, something went wrong and word was unable to start (24)" Opening Word documents is just fine, only previewing in the Windows preview pane. I have tried manually uninstalling Office, deleting registry keys and performing offline and online repairs of the Office install. Here is a good thread about this on Spiceworks that ends without resolve. My user is a heavy preview pane user, so the workaround in disabling the preview is not a solution. Also, upgrading back to 64-bit is not an option. Whoever figures this out will be a hero with tons of threads about this issue.
Ready, set, go!