After followed reverse integration of sp2 at the end after used the OOBE+Generalize+Shutdownby i am getting following errors in setuperr.log: 2009-10-23 23:31:05, Error [0x0f0082] SYSPRP LaunchDll:Failure occurred while executing 'C:\Windows\system32\msdtcprx.dll,SysPrepDtcCleanup', returned error code -2146434815[gle=0x000000b7] 2009-10-23 23:31:06, Error [0x0f0070] SYSPRP RunExternalDlls:An error occurred while running registry sysprep DLLs, halting sysprep execution. dwRet = -2146434815 2009-10-23 23:31:06, Error [0x0f00a8] SYSPRP WinMain:Hit failure while processing sysprep cleanup providers; hr = 0x80100101 Plz rectify me. your's anand