A family of Microsoft word processing software products for creating web, email, and print documents.
I can think of 3 possibilities, that focus on the new application you installed.
- It has an addin attached to the Office applications that changed the Office theme being used.
- The new application changed your Windows theme.
So there are 2 possible work a-rounds, based on Safe mode. Start Word in Safe mode to see if that fixes the problem. If that doesn't help, Start Windows in Safe mode.
SHORTCUT TO START WORD IN SAFE MODE OR EXCEL IN SAFE MODE, HOLD <CTL> KEY WHEN CLICKING ON ICON OR USING THE START MENU SEARCH WINDOW AND ENTERING WINWORD.EXE /A OR WINWORD.EXE /SAFE DON’T ASSUME ANYTHING!
Don’t assume some part of the trouble shooting processes listed below doesn’t apply to you. Often there are things going on in the background that you just aren’t aware of. For example, when installing software it is all too easy to have an unwanted app installed if you don’t carefully read every screen.
https://support.office.com/en-us/article/Work-w...
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WIKI FOR DOUG ROBBINS TROUBLE SHOOTING LIST - ABBYY
http://answers.microsoft.com/en-us/office/wiki/...
This is a collection of generic trouble shooting fixes for Office (2013)
FIX: “MICROSOFT WORD HAS STOPPED WORKING” – TURN OFF ADDINS IN PICTURES
http://www.thewindowsclub.com/fix-microsoft-wor...
How to find out whether any Word Add-ins have been installed
Enable or disable add-ins in Office programs - Support - Office.com
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WIN10 SAFE MODE / WIN 8 SAFE MODE
SAFE MODE- HOW TO ACCESS ADVANCED STARTUP OPTIONS IN WINDOWS 10 OR 8 - 6 WAYS
http://pcsupport.about.com/od/windows-8/a/open-...
MS CONFIG - SAFE MODE- HOW TO USE THE SYSTEM CONFIGURATION TOOL & ALL ITS AWESOMENESS! - WIN 7 / 8.1 / 10