Hi. Missed DCOM 1.3 registry entries in Unofficial SP. ------------------------------------------------------------------------------------- AddReg=OBJREFRegKeys DelReg=DelRegOnInstall [OBJREFRegKeys] HKCR,CLSID\{00000327-0000-0000-C000-000000000046},,,ObjrefMoniker HKCR,CLSID\{00000327-0000-0000-C000-000000000046}\InprocServer32,,,ole32.dll HKCR,CLSID\{00000327-0000-0000-C000-000000000046}\ProgId,,,objref HKCR,objref,,,URL:Objref Protocol HKCR,objref\CLSID,,,{00000327-0000-0000-C000-000000000046} [DelRegOnInstall] HKLM,Software\Microsoft\Windows\CurrentVersion\Uninstall\DCOM95 HKLM,System\CurrentControlSet\control\SessionManager\CheckVerDlls,ole32.dll HKLM,System\CurrentControlSet\control\SessionManager\CheckVerDlls,olethk32.dll HKLM,System\CurrentControlSet\control\InstalledFiles,rpcltc1.dll HKLM,System\CurrentControlSet\control\InstalledFiles,secur32.dll HKLM,SOFTWARE\Microsoft\Windows\CurrentVersion\Setup\Migration\100,DCOM95 ------------------------------------------------------------------------------------- Of course, the following 4 lines may not need. HKLM,Software\Microsoft\Windows\CurrentVersion\Uninstall\DCOM95 HKLM,System\CurrentControlSet\control\SessionManager\CheckVerDlls,ole32.dll HKLM,System\CurrentControlSet\control\SessionManager\CheckVerDlls,olethk32.dll HKLM,SOFTWARE\Microsoft\Windows\CurrentVersion\Setup\Migration\100,DCOM95