This is what the sylink log has
06/18 07:59:18 [9648] </CHttpFileDownload::~CHttpFileDownload()>
06/18 07:59:18 [9648] <LUThreadProc>@@@@@@@@@ LU DEBUG ONLY- Download file failed due to wrong file size.
FileName:C:\Program Files\Symantec\Symantec Endpoint Protection\LiveUpdate\LUF{C60DC234-65F9-4674-94AE-62158EFCA433}1006170511.TMP Expected file size: 80480041
06/18 08:08:15 [9064] <mfn_LiveUpdate> EVENT_LU_REQUIRE_STATUS returned ERROR_SYSTEM_UNKNOWN - Ignore LU content. Moniker: {1CD85198-26C6-4bac-8C72-5D34B025DE35} Seq:100617051
06/18 08:08:15 [9064] <PostEvent>going to post event=EVENT_LU_REQUIRE_STATUS
06/18 08:08:15 [9064] <PostEvent>done post event=EVENT_LU_REQUIRE_STATUS, return=1
06/18 08:08:15 [9064] <mfn_LiveUpdate> EVENT_LU_REQUIRE_STATUS returned ERROR_SYSTEM_UNKNOWN - Ignore LU content. Moniker: {42B17E5E-4E9D-4157-88CB-966FB4985928} Seq:100617001
06/18 08:08:15 [9064] <PostEvent>going to post event=EVENT_LU_REQUIRE_STATUS
06/18 08:08:15 [9064] <PostEvent>done post event=EVENT_LU_REQUIRE_STATUS, return=1
06/18 08:08:15 [9064] <mfn_LiveUpdate> EVENT_LU_REQUIRE_STATUS returned ERROR_SYSTEM_UNKNOWN - Ignore LU content. Moniker: {D3769926-05B7-4ad1-9DCF-23051EEE78E3} Seq:100617001
06/18 08:08:16 [9064] <PostEvent>going to post event=EVENT_LU_REQUIRE_STATUS
06/18 08:08:16 [9064] <PostEvent>done post event=EVENT_LU_REQUIRE_STATUS, return=1
06/18 08:08:16 [9064] <mfn_LiveUpdate> EVENT_LU_REQUIRE_STATUS returned ERROR_SYSTEM_UNKNOWN - Ignore LU content. Moniker: {C25CEA47-63E5-447b-8D95-C79CAE13FF79} Seq:80929016
Please upgrade to SEP RU5 and above.the logs say that you have MR4
This problem is fixed in Symantec Endpoint Protection 11.0 RU5. For information on how to obtain the latest build of Symantec Endpoint Protection, read Obtaining an upgrade or update for Symantec Endpoint Protection.
http://service1.symantec.com/SUPPORT/ent-security.nsf/docid/2007121216494948
Title: 'Symantec Endpoint Protection (SEP) client cannot update definitions from Symantec Endpoint Protection Manager (SEPM)'
Document ID: 2009020411575148
> Web URL:
http://service1.symantec.com/support/ent-security.nsf/docid/2009020411575148?Open&seg=ent