To apply this hotfix, you must be running Windows 7 or Windows Server 2008 R2. Additionally, you must have the new 1394 bus driver installed in Windows 7, as this hotfix does not apply to the legacy 1394 bus driver on Windows 7.
For more information about new and legacy 1394 bus drivers in Windows 7, visit the following Microsoft website:
To enable this hotfix, you must modify the registry. 
 To disable this hotfix, you must change the value of this registry entry to 0, or you must delete the registry entry.
You may use a VBScript similar to the following sample to automate setting this registry value for the Microsoft Windows 7 IEEE 1394 OpenHCI driver. 
'-------------- begin script -------------- 
On Error Resume Next
' Check the version number of the file against our reference
Function CheckVersion(sVerString)
    If osMajorVer = 6 Then
        If osMinorVer = 1 Then
            If spMajorVer >= 1 Then
               aMinVersion = Array(6, 1, 7601, 17062)
            Else
               aMinVersion = Array(6, 1, 7600, 20756)
            End If
        Else
            CheckVersion = false
            Exit Function
        End If
    Else
        CheckVersion = false
        Exit Function
    End If
    If IsNull(sVerString) Or IsEmpty(sVerString) Then
        CheckVersion = false
        Exit Function
    End If
    ' Split input on . and make sure there are 4 elements
    aVersion = Split(sVerString, ".")
    If UBound(aVersion) <> 3 Then
        CheckVersion = false
        Exit Function
    End If
    ' Check each element against the reference version number
    For i = 0 to 3
        If Int(aVersion(i)) < aMinVersion(i) Then
            CheckVersion = false
            Exit Function
        ElseIf Int(aVersion(i)) > aMinVersion(i) Then
            CheckVersion = true
            Exit Function
        End If
    Next
    ' If we get here then the version numbers are equal. Return true.
    CheckVersion = true
    Exit Function
End Function
' Get the WMI CIMv2 provider
Set oLoc = CreateObject("WbemScripting.SWbemLocator")
Set oCIMSvc = oLoc.ConnectServer("", "root\CIMV2")
' Get the WshShell object (for RegRead and RegWrite)
Set WshShell = CreateObject("WScript.Shell")
' On Vista and higher, handle UAC
Set oOSInfo = oCIMSvc.InstancesOf("Win32_OperatingSystem")
For Each os in oOSInfo
    osMajorVer = Int(Left(os.Version, 1))
    osMinorVer = Int(Mid(os.Version, 3, 1))
    spMajorVer = os.ServicePackMajorVersion
    If osMajorVer >= 6 And WScript.Arguments.length = 0 Then
        ' Use ShellExecute with runas verb to prompt for elevation
        Set oShell = CreateObject("Shell.Application")
        oShell.ShellExecute "wscript.exe", """" & WScript.ScriptFullName & _
            """ uac", "", "runas", 1
        WScript.Quit(0)
    End If
    Exit For
Next
' Check to make sure that 1394ohci.sys is a minimum version that supports this
' flag
Const SYSTEM_FOLDER = 1
Set oFS = CreateObject("Scripting.FileSystemObject")
sFileVer = oFS.GetFileVersion(oFS.GetSpecialFolder(SYSTEM_FOLDER). _
    SubFolders("drivers").Files("1394ohci.sys").Path)
If Not CheckVersion(sFileVer) Then
    WScript.Echo("The version of 1394ohci.sys on your system does not support the EnabletLabelBitmap flag. " & _
        "No changes to your system have been made.")
    WScript.Quit(0)
End If
' Write the EnabletLabelBitmap value 1 (enabled) to the registry
sRegPath = "HKLM\SYSTEM\CurrentControlSet\Services\1394ohci\parameters\EnabletLabelBitmap"
WshShell.RegWrite sRegPath, 1, "REG_DWORD"
' Check if write was successful. If not, chances are UAC is enabled
' and this is a non-elevated command prompt
If Err.Number <> 0 Then
    WScript.Echo("Error writing EnabletLabelBitmap registry value. " & _
        "Make sure you are running from an elevated command prompt")
    WScript.Quit(-1)
End If
WScript.Echo("Finished setting EnabletLabelBitmap flag for the 1394 OpenHCI driver. " & _
    "Please reboot your system for this change to take effect")
'-------------- end script -------------- 
The English (United States) version of this hotfix installs files that have the attributes that are listed in the following tables. The dates and the times for these files are listed in Coordinated Universal Time (UTC). The dates and the times for these files on your local computer are displayed in your local time together with your current daylight saving time (DST) bias. Additionally, the dates and the times may change when you perform certain operations on the files.
 Windows 7 hotfixes and Windows Server 2008 R2 hotfixes are included in the same packages. However, hotfixes on the Hotfix Request page are listed under both operating systems. To request the hotfix package that applies to one or both operating systems, select the hotfix that is listed under "Windows 7/Windows Server 2008 R2" on the page. Always refer to the "Applies To" section in articles to determine the actual operating system that each hotfix applies to.