This article was previously published under Q168015
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Some or all of the files you specify to repair when you run an EmergencyRepair may not be replaced.
The Setupdd.sys file drives the Emergency Repair process. After you selectto replace files, the version of Setupdd.sys included on the originalWindows NT 4.0 CD-ROM makes an additional check of these files.
The Emergency Repair process searches the Setup.log file for the files toreplace. After you select to replace the files, Setupdd.sys compares thefiles to the files on the original CD-ROM. If the files are different youare prompted to replace the files. If you choose to replace the files,Setupdd.sys reads the files from the CD-ROM and compares the VersionResource date of the files on the CD-ROM to the Version Resource date ofthe files on the computer. If the Version Resource date of the file on thecomputer is newer, then the file is not replaced. The Emergency Repairprocess does not indicate that the file is not going to be replaced.
The Setupdd.sys file in Service Pack 2 or later has the Version Resourcedate checking disabled. In order to ensure all files selected during anEmergency Repair process are properly replaced you must replace theSetupdd.sys file on disk 2 of the Installation disk set with theSetupdd.sys file from Service Pack 2 or later.
NOTE: If your computer (stops responding) hangs while reading the CD-ROM path to Autochk.exe, press ENTER to proceed.
If Service Pack 5 or later is installed on the computer, you may receive the following error message:
File setupdd.sys could not be loaded.The error code is 7
Setup cannot continue. Press any key to exit.
To work around this behavior, use the Setupdd.sys file from Service Pack 4.
When running an Emergency Repair on an Intel-based computer, you must startyour computer using the three installation boot disks. If you choose the "Verify Windows NT system files" option, the Emergency Repair processcontinues and prompts you for the Emergency Repair Disk (ERD). You are then prompted to replace files that it detects are different from thoselisted in your Setup.log file. You have the option to select an individualfile or to select all files. After you choose to replace files and yourestart your computer, there may still be files on the system that yourequested to replace.