Microsoft Office 2011 no longer working with Yosemite 10.10.2? When trying to open either Word or Excel, I get an error saying


  Microsoft Word (or Excel) cannot be opened because of a problem. Check with the developer to make sure Microsoft Word works with this version of OS X. You may need to reinstall the application. Be sure to install any available updates for the application and OS X.


I believe the two applications update in the background occasionally, but they were working fine until mid-last week.
I've tried myself and can confirm that Office 2011 works for OS X 10.10.2. I would recommend that you uninstall Office and then install it from your installation disc or redownloading it from Microsoft if you bought it as an online download.