If you are using Word 2013, select the HKEY_CURRENT_USER/Software/Microsoft/Office/15.0/Word key.If you are using Word 2010, select the HKEY_CURRENT_USER/Software/Microsoft/Office/14.0/Word key.

If you are using Word 2007, select the HKEY_CURRENT_USER/Software/Microsoft/Office/12.0/Word key.

In the Open box enter the name regedit.

Choose the Run option from the Start menu.

You may want to protect yourself from potential problems by backing up the Registry first, and then you can accomplish the following steps: This is not the end of the process you also need to make a few changes to the Registry. You should also remove any files from the Startup folder. In fact, it is a good idea to look for any file that begins with the word 'Normal' and then look at the filename extensions for those files to determine if you should rename them. You should make sure you rename the Normal.dotx file to a different name. If you make changes and then exit, you overwrite any resetting you did. This is because Word saves configuration information as it exits. You should remember that you cannot do 'resetting' of Word while the program is running. Thus, after an uninstall, it is likely to be necessary to edit the Registry to remove the settings. However, it's not so useful for those who are looking to get a completely 'clean' install with no throwbacks to previous installs. This is ideal for those who are upgrading-they get to keep their settings rather than find the upgrade overwriting them. The uninstall process does not remove all option settings stored in the Registry and many of these will be picked up after the re-install so that Word can use them. Many of the configuration settings unique to Word are stored in the Registry. This, however, will not lead to a pristine version of Word.

Other suggestions may include uninstalling and reinstalling Word. While this will restore some settings to their first-used state (such as macros, toolbars, and the like), it will not do the entire trick.

Many people think that the easiest way to do this is to simply allow Word to recreate the Normal.dot template. For instance, you may be offering Word training, and you want to reset Word between each class offered. There may be times when you want to set Word back to a pristine, first-installed condition.

How to reset office 365 to default