@Shadow Thank you for this interesting tool. I tested some earlier versions but they didn't work for me. The latest Beta seemed to work fine regarding the processes in task manager during installation. I could see that there was a new folder in program files which has been gone after installation. So there might have been a rollback during installation progress. Maybe you can see something in this log file? YY/MM/DD HH:MM:SS.mmm+---id---+Level--+---------------------------------------- 09/01/06 11:44:01.000|00000F8C|Always |** Begin logging in new file. Old file: ** YY/MM/DD HH:MM:SS.mmm+---id---+Level--+---------------------------------------- 09/01/06 11:45:02.000|00000F8C|Error |CTpiUnitConditionsCheckerSequencee::GetReferencedTPIs:3906: Referenced unit doesn't exist 09/01/06 11:45:02.000|00000F8C|Error |CTpiUnitConditionsCheckerSequencee::GetReferencedTPIs:3906: Referenced unit doesn't exist 09/01/06 11:45:02.000|00000F8C|Error |CTpiUnitConditionsCheckerSequencee::GetReferencedTPIs:3906: Referenced unit doesn't exist 09/01/06 11:45:02.000|00000F8C|Error |CTpiUnitConditionsCheckerSequencee::GetReferencedTPIs:3906: Referenced unit doesn't exist 09/01/06 11:45:02.000|00000F8C|Error |CTpiUnitConditionsCheckerSequencee::GetReferencedTPIs:3906: Referenced unit doesn't exist 09/01/06 11:45:02.000|00000F8C|Error |CTpiUnitConditionsCheckerSequencee::GetReferencedTPIs:3906: Referenced unit doesn't exist 09/01/06 11:45:02.000|00000F8C|Error |CTpiUnitConditionsCheckerSequencee::GetReferencedTPIs:3906: Referenced unit doesn't exist 09/01/06 11:47:07.000|00000EE4|Fatal |CMsi::LogDeployment:1033: Installation fatal error at unit 'unit_app_4' on msi 'C:\DOKUME~1\ex3135\LOKALE~1\Temp\RarSFX1\unit_app_4\unit.msi': Schwerwiegender Fehler bei der Installation., (1603) 09/01/06 11:48:57.000|00000EE4|Fatal |CMsi::LogDeployment:1033: Installation fatal error at unit 'unit_app_6' on msi 'C:\DOKUME~1\ex3135\LOKALE~1\Temp\RarSFX1\unit_app_6\unit.msi': Schwerwiegender Fehler bei der Installation., (1603) 09/01/06 11:50:37.000|00000EE4|Fatal |CMsi::LogDeployment:1033: Installation fatal error at unit 'unit_app_15' on msi 'C:\DOKUME~1\ex3135\LOKALE~1\Temp\RarSFX1\unit_app_15\unit.msi': Schwerwiegender Fehler bei der Installation., (1603) YY/MM/DD HH:MM:SS.mmm+---id---+Level--+---------------------------------------- 09/01/06 11:51:49.000|00000D7C|Always |** Start logging for module 'SCA.DLL' ** YY/MM/DD HH:MM:SS.mmm+---id---+Level--+---------------------------------------- 09/01/06 11:51:49.000|00000D7C|Error |CInstallManager::InstallFileAssociations:295: InstallExtension returned error for index 0: Unbekannter Fehler ERROR = 16389 FACITLITY = 0 09/01/06 11:51:50.000|00000D7C|Error |CNsiNeroAg::CADeferredFinalizeXXInstall:715: ERROR: 16389 [TT#68429]Can not install file associations. We must avoid rollback, so let's skip this error... YY/MM/DD HH:MM:SS.mmm+---id---+Level--+---------------------------------------- 09/01/06 11:51:52.000|00000D7C|Always |** End logging for module 'SCA.DLL' ** YY/MM/DD HH:MM:SS.mmm+---id---+Level--+---------------------------------------- YY/MM/DD HH:MM:SS.mmm+---id---+Level--+---------------------------------------- 09/01/06 11:52:22.000|00000F2C|Always |** Start logging for module 'SCA.DLL' ** YY/MM/DD HH:MM:SS.mmm+---id---+Level--+---------------------------------------- 09/01/06 11:52:22.000|00000F2C|Error |CInstallManager::InstallFileAssociations:295: InstallExtension returned error for index 0: Unbekannter Fehler ERROR = 16389 FACITLITY = 0 09/01/06 11:52:22.000|00000F2C|Error |CNsiNeroAg::CADeferredFinalizeXXInstall:715: ERROR: 16389 [TT#68429]Can not install file associations. We must avoid rollback, so let's skip this error... YY/MM/DD HH:MM:SS.mmm+---id---+Level--+---------------------------------------- 09/01/06 11:52:25.000|00000F2C|Always |** End logging for module 'SCA.DLL' ** YY/MM/DD HH:MM:SS.mmm+---id---+Level--+---------------------------------------- YY/MM/DD HH:MM:SS.mmm+---id---+Level--+---------------------------------------- 09/01/06 11:52:54.000|00000248|Always |** Start logging for module 'SCA.DLL' ** YY/MM/DD HH:MM:SS.mmm+---id---+Level--+---------------------------------------- 09/01/06 11:52:54.000|00000248|Error |CInstallManager::InstallFileAssociations:295: InstallExtension returned error for index 0: Unbekannter Fehler ERROR = 16389 FACITLITY = 0 09/01/06 11:52:54.000|00000248|Error |CNsiNeroAg::CADeferredFinalizeXXInstall:715: ERROR: 16389 [TT#68429]Can not install file associations. We must avoid rollback, so let's skip this error... YY/MM/DD HH:MM:SS.mmm+---id---+Level--+---------------------------------------- 09/01/06 11:52:55.000|00000248|Always |** End logging for module 'SCA.DLL' ** YY/MM/DD HH:MM:SS.mmm+---id---+Level--+---------------------------------------- 09/01/06 11:56:20.000|00000F8C|Error |CDeploymentLogger::AddLine:203: Error in deployment process at sequencee 'Installer' YY/MM/DD HH:MM:SS.mmm+---id---+Level--+---------------------------------------- 09/01/06 11:56:33.000|00000F8C|Always |** End logging for module 'ProductInstaller2' ** YY/MM/DD HH:MM:SS.mmm+---id---+Level--+---------------------------------------- Thanks for any hints.