Consider the following scenario:

• You have a computer that is running Windows Server 2008 or Windows Vista Service Pack 1.
• The computer has a Peripheral Component Interconnect (PCI) Express interface.
• You have at least one PCI Express card that does not fully support Active State Power Management (ASPM) inserted.
• You restart the computer.

In this scenario, an internal error may occur during restart. For example, a CPU IERR error may occur. Additionally, the system may stop responding.

This problem occurs approximately one time in every 500 restarts. Therefore, you usually experience this issue only when you are running restart tests. However, the risk of this problem occurring increases significantly if the following conditions are true:

• You apply hotfix 952681 on the computer.
• You insert PCI Express cards that do not fully support ASPM into all available PCI Express slots.

On a Windows Server 2003 or Windows Vista based computer, when you try to upgrade HP printer drivers, it hangs at the finish window. If you try to restart the spooler, the following error message occurs:

Unable to install printer driver, Operation could not be completed.

After you install or uninstall an update package for a USB Human Interface Device (HID) component on a Windows Vista-based computer, the computer may stop responding. Additionally, you may receive the following message when the computer restarts:

Windows is configuring the updates

Note: This problem occurs only on a specific kind of Windows Vista-based computer.

A modal dialog box is open when you try to redraw a Windows Internet Explorer 7 window by using a script call in the main window. In this case, Windows Internet Explorer 7 stops responding (hangs).

In a Microsoft Windows Workflow Foundation project, the Unload method may stop responding (hang). This problem may occur when a Replicator activity is inside a TransactionScope activity.

You encoutner the following symptoms on the Windows Server 2003 computer or Windows Vista computer:

• When you try to install printer, the add Printer Wizard Hangs.
• The system hangs.
• The printer spooler hangs.

When you start a Windows Vista-based computer, the system may stop responding (hang) at a black screen.

Additionally, you may experience the following symptoms when you try to recover from this problem:

• If you restart the computer, press F8 before the Windows Vista progress indicator appears, and then click the Safe Mode option, the same problem occurs.
• If you start Windows Recovery Environment (WinRE) to restore the Windows Vista-based computer, WinRE stops responding.
• If you try to use Windows Vista installation media to repair the system, the system stops responding.