A Windows Vista-based computer may stop responding during shutdown after you install a series of hotfixes and then try to restart the computer
Consider the following scenario. On a Windows Vista-based computer, you install a series of hotfixes without restarting the computer. Then, you try to restart the computer to complete the hotfix installation. However, the system may stop responding (hang) while the computer is shutting down. The shutdown process stops responding at the following message:
Windows is configuring the updates
This behavior continues until you manually turn off the computer.
For more information on this issue, including potential causes, workarounds, and resolutions, see: Microsoft KB Article KB951720.