Windows 2008 r2 sysprep – A fatal error occurred while trying to sysprep the machine - Windows Could Not parse or process unattend answer file for pass

Windows 2008 r2 sysprep – A fatal error occurred while trying to sysprep the machine 

AND

 Windows Could Not parse or process unattend answer file for pass

When I run sysprep, I found an error message “A Fatal error occurred trying to sysprep the machine”

To solved this problem, I do a this workaround :

• Change registry key HKEY_LOCAL_MACHINE\SYSTEM\Setup\Status\SysprepStatus to 7

• Change HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\SoftwareProtectionPlatform\SkipRearm to 1
• And then Delete the folder Panther.

• And then run sysprep again.

After reboot when the installation  through following error message

"Windows could not parse or process unattend answer file [C:\windows\Panther\unattend.xml] for pass [specialize]. A component or setting specified in the answer file does not exist"

do This:

1. Press SHIFT+F10 to open a command prompt
2. type regedit
3. in registry editor navigate to:
4. HKLM/SYSTEM/Setup/Status/ChildCompletion
5. if setup.exe is 1, change it to 3.
6. restart