MS Word crashes when trying to close an MS Word file

delete the

registry subkey. To do this, follow these steps:
  1. Exit all Office programs.
  2. Click Start the Start button, type regedit in the Start Search box, and then press ENTER.
    User Account Control permission If you are prompted for an administrator password or for a confirmation, type the password, or click Continue.
  3. Locate and then click the following registry subkey:
  4. On the Edit menu, click Delete, and then click Yes.
  5. Exit Registry Editor.
  6. Restart Word.