Getting Symantec error while opening Outlook 2003

Error: The add-in "C:\Program Files\Symantec AntiVirus\vpmsece2.dll" could not be installed or loaded. This program may be resolved by using Detect and Repair on the Help menu.

To fix the problem, find and delete all copies of the Extend.dat file on the computer. A copy of this file exists for each local user account. Then, restart the computer.

Note: You cannot delete copies of the Extend.dat file for other user accounts unless you log on with an account that has local administrator rights.

To find and delete copies of Extend.dat
Exit Outlook if the program is open.
Confirm that Windows is set to show hidden and system folders.
To show hidden and system folders, read How to make Windows show all files.
On the Windows taskbar, click Start > Search > For Files or Folders.
Under "Search for files or folders named," type the following text:

extend.dat

Click Search Now.
Wait for the search to finish.
Delete all copies of the Extend.dat file.
Restart the computer.

If a Group Policy that hides system files is in effect, you may not find the Extend.dat file when you search or browse, even after you set Windows to show all files. If you do not find any copies of the Extend.dat file, use command prompt to delete the file(s).