With Microsoft Windows XP system with McAfee Internet Security/McAfee VirusScan Plus preinstalled, go though out of box setup, try to restart or shutdown system from start menu, does not work. User has to cold boot the system, and after that, the problem will not occur again.
The above symptom is associated with, but not limited to, the following systems:
The hang is due to a wait on the loader lock. This problem in Shimeng.dll was fixed in the below KB. Though the date of the binary on the system is latest than the below KB, the version is lower.
KB949900 The RunOnce.exe process may stop responding during the driver installation process on a Windows XP-based computer
This is a permanent limitation.
Manually power off the system (Press the power button for several seconds) and restart.