On a computer that is running Windows Vista or Windows Server 2008, you use WinWord.exe to check in a document to a SharePoint server. However, the document changes do not commit to the SharePoint server. You may also receive an error message which resembles the following:
Word did not save the document
This file is read-only
Note: This problem does not occur on a client computer that is running Windows XP or Windows Server 2003.