In addition:
Anti-virus programs run as services, and also provides an user interface. Services load early, but the user interface load after you logon.
To see the list of third-party services, run MSCONFIG.EXE and switch to "Services" tab. Put a checkmark near "Hide All Microsoft services". Your Anti-virus service should be listed there. Click "Cancel" to close MSCONFIG.
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Regards,
Ramesh Srinivasan, Microsoft MVP [Windows Shell/User]
Windows® Troubleshooting
http://www.winhelponline.com
When I first boot my computer, how can I change the order in which my
programs start up? For Instance, my anti-virus program starts last which
leaves me open for attack while the others are loading.