When attempting to install Symantec Endpoint Protection in Windows Vista, why does my computer tell me to reboot after I've already rebooted?

Warning: This document contains instructions for editing the registry. If you make any error while editing the registry, you can potentially cause Windows to fail or be unable to boot, requiring you to reinstall Windows. Edit the registry at your own risk. Always back up the registry before making any changes. For information, see In Windows XP and Vista, how do I back up the registry? If you do not feel comfortable editing the registry, do not attempt these instructions. Instead, seek the help of a computing support provider.

If you try to install Symantec Endpoint Protection on a computer with Windows Vista Home Premium or Ultimate installed, you may receive a message saying:

"Pending system changes that require a reboot have been detected."

After clicking OK, however, the installation stops. Rebooting the computer does not resolve the problem.

This behavior may occur due to following Windows registry value:

To delete this value, follow the instructions in the Symantec knowledge base, and then try installing Symantec Endpoint Protection again. Do not restart your computer before retrying the installation.

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