Good morning, all. We have been working extensively with a top-level Symantec engineer on this issue for some time. The two issues, for us, have been resolved. To recap:
Shutdown Issue
This was the issue where the SEP driver would hang up on shutdown and the machine would freeze. This was resolved sometime in November (I beleive) in a Bash update that was rolled out to both 12.1.4x and 12.1.5x.
Network Share not Responding Issue
Having gone through mutliple iterations of 12.1.4 and 12.1.5, the ultimate resolution was not specific to a version of software or a patch, but a registry key. We tried this on multiple machines, physical and virtual, 2008 R2 and 2012 R2 - all of them have been healthy for weeks if not months since applying this. Prior to, we were having lock-ups weekly or better. Here is the key:
By default, Deferred Scan feature is Enabled and it will delay to scan. To disable Deferred Scan feature, 1. Disable Tamper Protection.
2. Create registry key to disable this option.
3. Click Start > Run
4. Type in: regedit and click OK
5. Navigate to:
"HKEY_LOCAL_MACHINE\SOFTWARE\Symantec\Symantec Endpoint Protection\AV\Storages\Filesystem\RealTimeScan" (32 bit Operating System) or “HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\Symantec\Symantec Endpoint Protection\AV\Storages\Filesystem\RealTimeScan” (64 bit Operating System)
6. Click Edit > New > DWORD Value
7. Name the new value: DeferredScanning
8. Open DeferredScanning
9. In the Value data field add “0” (1 = on, 0 = off)
10. Click OK
11. Close the Registry Editor window.
12. Enable Tamper Protection again.
Hope this helps everyone! Symantec Engineers - chime in if I got something wrong here. This was the result of my open case with one of the principal tech support engineers.