Hi Harneesh,
Are you saving the document before closing it? If so, make sure that
somebody has not played a prank on you be creating a macro called FileSave
in you normal.dot template, or as an addin. If there was a macro with that
name, it will run whenever you invoke the File Save command, and if the
macro has nothing in it, nothing will happen. A more devious prankster
might have just included the command
ActiveDocument.Saved = True
in which case you would not be warned that the document had not be saved
when you closed it.
Also try saving with another name by using File Save As
Please post any further questions or followup to the newsgroups for the
benefit of others who may be interested. Unsolicited questions forwarded
directly to me will only be answered on a paid consulting basis.
Hope this helps
Doug Robbins - Word MVP