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error roll back

Created: 07 Apr 2013 | 7 comments
jun82's picture

hi everyone,

when i try to install manually the SEP client on a window 8 pro, SEP will  roll back please see attached file. SEP 12.1 ru2

Operating Systems:

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W007's picture


Try to Disable Windows Defender

That's is known issue

Symantec Endpoint Protection client fails to install to recently updated Windows 8 computers

Article:TECH203996  |  Created: 2013-03-18  |  Updated: 2013-03-18  |  Article URL

Check mithun Comments below thread

Don't forget to mark your thread as 'SOLVED' with the answer that best helped you.

Ambesh_444's picture


There is a known issue, Symantec Endpoint Protection client fails to install to recently updated Windows 8 computers. Please refer to below technote for more details. Check whether you are having the same issue.

Refer this thread as well:

Thank& Regards,


"Your satisfaction is very important to us. If you find above information helpful or it has resolved your issue. Please don't forget to mark the thread as solved."

Rafeeq's picture

Seems to be a permission issue, follow this document. check if all the registry keys have appropriate permissions.

SEP installation issue Error 1920 (SepMasterService) failed to start

.Brian's picture

Is it fully patched?

If so, disable Windows Defender and remove KB2781197 and try the install again

Please click the "Mark as solution" link at bottom left on the post that best answers your question. This will benefit admins looking for a solution to the same problem.

Mithun Sanghavi's picture


This problem is fixed in the Latest version of Symantec Endpoint Protection 12.1 Release Update 3 (12.1 RU3) which has been released on June 6 2013.

New fixes and features in Symantec Endpoint Protection 12.1.3

After applying Microsoft update KB2781197 to a Windows 8 computer, the Symantec Endpoint Protection client installer fails

Fix ID: 3123310

Solution: For installations on Windows 8, removed the option to enable/disable Windows Defender after install, as this is no longer supported. Windows Security Center (WSC) will automatically disable Windows Defender when Symantec Endpoint Protection registers with WSC.

For information on how to obtain the latest build of Symantec Endpoint Protection, read ‘Obtaining the latest version of Symantec Endpoint Protection or Symantec Network Access Control

For more - Check these BLOG's:

1) Latest Symantec Endpoint Protection Released - SEP 12.1.RU3

2) What's new with Latest Symantec Endpoint Protection SEP 12.1.RU3

3) Knowledgebase Articles for Symantec Endpoint Protection 12.1. RU3

4) Knowledgebase Articles for Symantec Endpoint Protection SBE 12.1. RU3

Hope that helps!!

Mithun Sanghavi
Senior Consultant

Don't forget to mark your thread as 'SOLVED' with the answer that best helped you.

SameerU's picture


Please install SEP 12.1 RU3


Sumit G's picture

Agree with Mithun S.

There was a problem in SEP 12.1 RU2 with Window 8, which has fixed in SEP 12.1 RU3.

So you can install that one.


Sumit G.