Microsoft processes and Symantec Endpoint Protection Master Service (ccsvchst.exe) will not start, Internet Explorer and Chrome browsers crash.
On August 23, 2016, an update to the Intrusion Prevention component of Symantec Endpoint Protection enabled additional application hooks intended to improve efficacy and protection. In some cases, it was found that some 3rd party security applications were incorrectly overwriting these hooks. The side effect of this conflict is that SEP client processes and other 3rd party processes may unexpectedly stop or terminate.
IPS Content: August 26th, 2016 rev. 12 (20160826.012) is now available for download.
This update removes the additional application hooks within IPS and should resolve the issues being seen with these 3rd party products and the Symantec Endpoint Protection client.
If you have a client that is currently impacted, then you may need to perform at least one of the remediation options listed below. This is only relevant if the SEP client process/service is in a stopped state and cannot be started again.