To stop Word from converting your saved files, you can disable any PDF-related plugins or add-ons in Word. Here’s how: Open Word and go to the "File" tab. Select "Options" from the left-hand menu. In the Word Options dialog box, select "Add-Ins". Look for any PDF-related plugins or add-ons and disable them. More @Wikipedia
Hover over any link to get a description of the article. Please note that search keywords are sometimes hidden within the full article and don't appear in the description or title.