See http://support.microsoft.com/?kbid=313472 "'The document is
locked for editing by another user' error message when you try to
open a document in Word".

bellabell wrote:

I have a document in Microsoft word which I wish to delete. It is showing as
a read-only document and I cannot delete it. It says it is locked for editing
when I try to open it, but I can view it by pressing read only button. When I
try and delete it I get the message : Access is denied. Not sure why it is
read only as I have not saved it this way. And the read only tab is not
checked either. Hope this makes sense. Thanks.