Article ID: 216207 - View products that this article applies to.
This article was previously published under Q216207
If your startup system files or the Windows NT registry is corrupted or changed, you can use the Emergency Repair Disk (ERD) to return the system to a bootable state. This article provides information on the repair process and how to use the ERD.
Maintaining a current ERD is just as important as having a current computer backup. When you make configuration changes to your computer (such as installing new software, changing software configuration, altering network configuration, hardware changes, or operating system updates), you should update your ERD with the Rdisk.exe or the To Do List, which starts Rdisk.exe for you.
The purpose of the ERD is to restore a computer to a bootable state; it is not a replacement for regular backups. You can use the ERD to replace damaged system files, restore damaged or incorrect registry information, and rebuild the startup environment.
When your run Rdisk.exe, an ERD is created that includes:
Creating an ERDIn the Manage Server Console To Do List, there is an option to create an ERD. Microsoft Product Support Services recommends that you create an ERD during Setup so that you have the proper tools available in case recovery becomes necessary.
Using the ERD
For additional information, please see the following articles in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/129037/EN-US/ )Windows NT 3.5x and 4.0 Emergency Repair Process Screens
(http://support.microsoft.com/kb/150497/EN-US/ )How to Repair Windows NT System Files Without a CD-ROM Attached
(http://support.microsoft.com/kb/126464/EN-US/ )Repair Disk Utility Does Not Update SAM and Security Hives
(http://support.microsoft.com/kb/122857/EN-US/ )RDISK /S and RDISK /S- Options in Windows NT
(http://support.microsoft.com/kb/164471/EN-US/ )Replacing System Files Using a Modified Emergency Repair Disk
(http://support.microsoft.com/kb/165418/EN-US/ )Before Installing a Windows NT Service Pack
(http://support.microsoft.com/kb/166157/EN-US/ )ERD Err: 'The following value in the setup information file'
(http://support.microsoft.com/kb/162788/EN-US/ )RDISK Error: 'One Or More Configuration Files Were Not Found'
(http://support.microsoft.com/kb/165713/EN-US/ )Creation of an Emergency Repair Disk Fails
(http://support.microsoft.com/kb/165711/EN-US/ )Repair Disk Utility Cannot Save All Configuration Files
(http://support.microsoft.com/kb/165710/EN-US/ )Creating an Emergency Repair Disk Fails - Disk Unusable
(http://support.microsoft.com/kb/158866/EN-US/ )How to Manually Create an Emergency Repair Disk
(http://support.microsoft.com/kb/158423/EN-US/ )WinNT 4.0 ERD Won't Allow Repair w/out Compact Disc Installed
(http://support.microsoft.com/kb/113976/EN-US/ )Using Emergency Repair Disk With Fault Tolerant Partitions
(http://support.microsoft.com/kb/105244/EN-US/ )Emergency Repair Disk May Not Repair All Windows NT Files
(http://support.microsoft.com/kb/100315/EN-US/ )Steps Performed by the Emergency Repair Disk