Remove all previous log files from C:\program files\lenovo\system update\logs
If you're using other version than Professional, just change WIN7-PRO.SP1 to WIN7-UTL.SP1 etc and 4th line to WINDOWS 7 Ultimate.
For Windows Server 2008, try the following code, I've put together. Bare in mind that it is not tested so please take a back up of the original XML file stated above before making changes on the server.
<Name>Windows Server 2008 Standard</Name>
<ServiceRelease>Service Pack 1</ServiceRelease>
<OSQuest>Windows Server 2008</OSQuest>