You receive a "The command cannot be performed because a dialog box is opened" error message when you try to open a file in Word 2007 or in Word 2003

When you try to open a file in Microsoft Office Word 2007 or in Microsoft Office Word 2003, the file does not open, and you receive an error message that is similar to the following:

This problem may occur if the Officeav.dll file is corrupted or outdated. The Officeav.dll file is the Norton AntiVirus Office plug-in.

To resolve this problem, rename the Officeav.dll file. To do this, follow these steps.

Note Because there are several versions of Microsoft Windows, the following steps may be different on your computer. If they are, see your product documentation to complete these steps.

1. Click Start, click Search, and then click All files and folders.
2. In the All or part of the file name box, type officeav.dll.
3. In the Look in box, click Local Hard Drives.
4. Click Search. When the search result is displayed in the right pane, note the path of the Officeav.dll file.
5. Locate the Officeav.dll file, right-click officeav.dll, and then click Rename.
6. Type officeav.old, and then press ENTER.
7. Restart your computer.

The third-party products that this article discusses are manufactured by companies that are independent of Microsoft. Microsoft makes no warranty, implied or otherwise, regarding the performance or reliability of these products.