After my system rebooted following a MS patch install I noticed that my symantec protection was off on my Sep11. I have Vista 64bit and tried to repair this issue. I found some information on a Symantec site other forums etc. The option that worked was to into add/remove software and do a repair on the entire install of Sep11. After another reboot all seem to have returned to normal for me. Anyway, let me know if you see something else or none of these will work for youw. Good Luck!!

Symantec Endpoint Protection error: PTS (or TruScan) has generated an error: code 11: description: Whitelist Failure

Question/Issue:
PTS has generated an error: code 11: description: Whitelist Failure

Symptoms:
By default, the error appears one hour after the Symantec Endpoint Protection service is started. If the Heuristics and Proactive threat detection scan frequency is changed from the
default frequency then the error will occur when the initial Proactive Threat scan (PTS) starts. In some cases, Proactive Threat Protection (PTP) shows as disabled and Awaiting Updates.

Cause:
The Whitelist Failure error occurs when PTP is installed and the definitions have not properly propagated to the PTP definition location on the client computer.

Solution:
Validate the presence of the PTP definitions
1. Navigate to C:\Documents and Settings\All Users\Application Data\Symantec\SyKnAppS\
2. If this folder contains 3 empty folders and 2 files (patch25.dll and SyKnAppS.dll), then the client has not retrieved and applied the PTP definitions.
3. Verify that the client can contact its source for definitions.


o Run LiveUpdate on the Symantec Endpoint Protection client.
o If the Symantec Endpoint Protection client is not allowed to run LiveUpdate, and retrieves definitions from the Symantec Endpoint Protection Manager then verify that the client is communicating properly
with the Symantec Endpoint Protection Manager server.
o If the Symantec Endpoint Protection Manager does not pull down the whitelist content until after the client is installed, the client will not be able to retrieve the content. Look for the following folder:
C:\Program Files\Symantec\Symantec Endpoint Protection Manager\Inetpub\content\{812CD25E-1049-4086-9DDD-A4FAE649FBDF}\\Full
If the {812CD25E-1049-4086-9DDD-A4FAE649FBDF} moniker folder is not present then run LiveUpdate from within the Symantec Endpoint Protection Manager console. This will make the content available for the Symantec Endpoint Protection client to download.

The following may also resolve this issue:

* Modify the installation of Symantec Endpoint Protection through Add or Remove Programs and uninstall Proactive Threat Protection, then modify it a second time to reinstall it.
* Uninstall both LiveUpdate and Symantec Endpoint Protection, reinstall Live Update, then reinstall Symantec Endpoint Protection.