Microsoft Word 2003 sometimes can not open file doc.

[password]

.doc not opening sometime

I have some doc files that can not be opened by Word 2003. But when I used old computer with Word 2002 or Word 2000, I can open that file. This is inconvinient. Do you know what is the problem?
Thanks in advance.
Regards

 

[salma ali bakr]

i guess sometimes there are viruses in word
u should reinstall it
once all my office applications didn't open at all...and it didn't want to be reinstalled
and i had to install windows again