Sysprep fail due to Licensing Rearm run more than three times

When I run Sysprep program on Windows 7 x64 Enterprise version,I get a error message as the following imageI know there is some error content in C:\Windows\System32\sysprep\Panther\setuerr.log
The content is as:
2012-04-21 19:27:47, Error [0x0f0073] SYSPRP RunExternalDlls:Not running DLLs; either the machine is in an invalid state or we couldn't update the recorded state, dwRet = 31
2012-04-21 19:27:47, Error [0x0f00ae] SYSPRP WinMain:Hit failure while processing sysprep cleanup external providers; hr = 0x8007001f

Based on this error content, I search the related information by Google and find out the reason is “the Windows Software Licensing Rearm program has run more than three times in a single Windows image” from Microsoft KB929828
Run “slmgr.vbs /dlv” by command prompt Run As Administrative credential
We will see Remaining Windows rearm count = 2, not 0
Run “cscript slmgr.vbs –rearm” by command prompt Run As Administrative credential
Use “regedit” to change the registry keys \HKEY_LOCAL_MACHINVE\SYSTEM\Setup\Status\SysprepStatus\
CleanupState = 2
GeneralizationState = 7
Run “msdtc –uninstall” and “msdtc –install” by command prompt Run As Administrative credential
Reboot it and Run “Sysprep” again so that it will be executing now.Sometime it will successfully complete Sysprep, but sometime it still fail but error content is different with the above word. Even though it fail, this VM still can be initialed system after reboot.

Although the Microsoft suggest resolution is “rebuild the Windows Image”, I want to firstly run the Rearm process by slmgr.vbs run as Administrative credential next to reinstall Windows 7 upgrade mode if slmgr.vbs fail always or Remaining Windows rearm count = 0.
Because it will spend more time to wait for installing system & hotfix in the duration of upgrade mode！