Hello,
The Steps below are not recommended, however worth a try.
Symantec Strongly recommends leaving Auto-protect to load at system startup due to the threat of network aware infectors that have the ability to compromise a machine before a user logs on.
How to configure when Auto-protect loads for Symantec Endpoint Protection managed clients:
- Launch the Symantec Endpoint Protection Manager.
- Select the Policies tab in the left-hand pane.
- Under "View Policies" select AntiVirus and Antispyware
- In the right-hand window, select the policy that you wish to change Auto-protect's loading order for, then in the "Tasks" section, select Edit the policy.
- In the left-hand column, select File System Auto-Protect
- Select the Advanced tab
- In the "Startup and Shutdown" section you will be able to specify when Auto-Protect loads.
Check the Screen Shot and check if that works for you.
Other factors that impact boot times:
By default, Symantec AntiVirus and Symantec Endpoint Protection run a startup quick-scan of the file system at system startup which is a low impact scan of common areas infectors are found.
How to disable/enable Startup and Quick Scans within the Symantec Endpoint Protection Manager
http://www.symantec.com/business/support/index?page=content&id=TECH103044