The company has confirmed that it’s now working on a fix
I’ve already reported to you that one of the updates released by Microsoft on Patch Tuesday breaks down file associations on a number of Windows 7 computers, but the company has only now acknowledged the issues.The Office team wrote in a blog post that the KB2589275 patch indeed messes up file associations for the productivity suite and confirmed that a fix is in the works as we speak.
At the same time, Microsoft released two simple workarounds for those who need work with Office until a patch comes out, as it could take a few more days until this happens.
Basically, users are recommended to right-click any Office document they might want to open and use the “Open with” option in the context menu to easily launch Word, Excel, PowerPoint or any other tool included in productivity suite.
In addition, they can manually launch the “Programs and Features” screen in Control Panel and hit the repair option next to the Microsoft Office entry to quickly fix all issues.