Hi I have installed the exchange 2000 on the DC and configured it for e-mail's. so my current configuration is Win2K Advance Server with SP4 and exchange 2000 server with sp3 and Post sp3 fix of september. when i try to install the norton antivirus 2.12 for exchange it gets installed successfully, but the information store service is stopping as the user opens the outlook or OWA to check the e-mails. the error in the event viewer is 7031. i cannot start the services for norton antivirus and Information store simultenously. i need to stop the norton antivirus service for the information store service to start. i need to solve this issue as soon as possible. help me solve this problem plss... thanks.