Install Symantec Endpoint Protection 11 on Windows Vista, 64-bit edition

Download the installer from

Open downloaded installer

Click Run, if prompted with a security warning

Click Next

Click I accept the terms in the license agreement

Click Next

Choose Unmanaged Client

Click Next

Choose Custom

Click Next

Click Network Threat Protection, then choose This feature will not be available.

Click Next

Choose Enable Auto-Protect

Choose Run LiveUpdate

Choose Disable Windows Defender

Click Next

Click Install

The program will install with the selected settings. This may take a few minutes.

Once completed, click Finish