The file is open
If another user has the file open, or if you have the file open in another session of Excel, PowerPoint, or Word on the same computer, close the file before you try to delete it. When one of these programs opens a file, the file is locked and can only be opened again as read-only. The file cannot be deleted while it is locked.
You do not have delete permissions
If you open a file that is stored on another computer, verify that you have sufficient permissions to the folder or file. To delete a file, you must have either Full permissions or the following base permissions for the file or folder on the computer that is hosting the file:
Operating Windows NT Windows NT Windows 98
system Windows 2000 Windows 2000 Windows Me
Windows XP
(NTFS) (FAT) (FAT)
-------- ------------ ------------ ----------
File: RWXD N/A N/A
Folder: RWXD Change DF
R = Read
W = Write
X = Execute
D = Delete
F = List Files
N/A = Not Available
Note When you use other network operating systems, such as Novell Netware, the requirements are similar to Microsoft Windows NT and Windows 2000 (NTFS file system) requirements.