Uninstall a program using Command Prompt. At first, type cmd in the Search box, right-click on Command Prompt option, and press Run as administrator. This will launch elevated Command Prompt window.

Now, just delete the value in this key, that represents the program to be removed, from the ‘Open With’ list. In this case, you can safely delete WINWORD.exe from .pdf . Close regedit .

How to Remove Unwanted Pre-Installed Programs on a Sony VAIO. Sony's line of Vaio desktop and laptop computers offers a variety of features and tools to help you boost your business' productivity.