Dell Optiplex 745 computers cannot start in normal mode after installing Symantec AntiVirus 10.1

Symptom
You install Symantec AntiVirus 10.1 or Symantec Client Security 3.1 to a Dell Optiplex 745 computer with a dual core chip. When you restart the computer,Windows cannot start in normal mode. The Dell notice is here and the Symantec notice is here.

Resolution
Symantec is investigating this problem to determine a solution. This document will be updated when new information or a solution is available.

To work around the problem, create the UseVolumeInfoList registry value (in HKEY_LOCAL_MACHINE\SOFTWARE\Intel\LANDesk\VirusProtect6\CurrentVersion\Storages\Filesystem\RealTimeScan) and set the value to 0. Then, restart the computer.