Thank you for posting in Microsoft Community. As per the issue description you are unable to open only.DOC file from Word 2013.
I would need more information to assist you with the issue:
1. Are you able to open files saved in .DOCX format?
2. The files that you are unable to open, are these files created on the system or did you download these files from internet or emails?
Follow the steps mentioned below and check if it helps:
· Open Word document.
· Click on File<
Options< Trust Center< Trust Center Settings<
· Under Protected
View group uncheck all the three options.
· Click Ok twice. Close and open any Word document and check if it works fine.
I hope the above suggestion helps. If you need further assistance on this particular issue or any other Office related issues let us know and we will be glad to assist you.
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