Unable to open SEP post installation and system reboot

Products

• Endpoint Protection
• Endpoint Security
• Endpoint Security Complete

Issue/Introduction

Unable to open Symantec Endpoint Protection (SEP) post installation and system reboot

The SEP service is stopped and is unable to start. 

The following prompts are observed in this problem state:  

"SymCorpUIRes.dll could not be found"
"Failed to verify signature"
"SmcRes.dll could not be found"
"VpShellRes.dll could not be found"

Environment

Symantec Endpoint Protection (SEP) 14.3 RU7 and later
Windows 10/11 22H2, 23H2 and 24H2

Resolution

Symantec is aware of this issue and will release a fix in SEP version 14.4. In the mean-time for an available workaround, contact Support. 

Additional Information

CRE-18381