DOCUMENT:Q131352 29-MAY-2002 [win95x] TITLE :Using Registry Editor in Real Mode PRODUCT :Microsoft Windows 95.x Retail Product PROD/VER:: OPER/SYS: KEYWORDS:kbtool ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows 95 ------------------------------------------------------------------------------- IMPORTANT: This article contains information about editing the registry. Before you edit the registry, you should first make a backup copy of the registry files (System.dat and User.dat). Both are hidden files in the Windows folder. SUMMARY ======= The registry is a system-wide database used for storing Windows 95 soft- ware and hardware configuration settings. The registry consists of the System.dat and User.dat files, which are located in the Windows folder. These files are backed up as System.da0 and User.da0 after every successful boot of Windows 95. Windows 95 includes a Registry Editor program (Regedit.exe) that runs in both the real-mode MS-DOS environment and in the protected-mode Windows environment. When you need to modify the registry without starting Windows 95, use Registry Editor in real mode. Note that the switches listed in this article only work in real-mode. MORE INFORMATION ================ WARNING: Using Registry Editor incorrectly can cause serious problems that may require you to reinstall Windows 95. Microsoft cannot guarantee that problems resulting from the incorrect use of Registry Editor can be solved. Use Registry Editor at your own risk. NOTE: For information about how to edit the registry, view the Changing Keys And Values online Help topic in Registry Editor (Regedit.exe). Note that you should make a backup copy of the registry files (System.dat and User.dat) before you edit the registry. To export, modify, and then import registry data using Registry Editor in real mode, follow these steps: 1. Restart your computer. When you see the "Starting Windows 95" message, press the F8 key and then choose Safe Mode Command Prompt Only from the Startup menu. 2. Change to the folder in which Windows 95 is installed by typing the following command at the command prompt, and then press ENTER " cd\ " (without the quotation marks) where is the folder in which Windows 95 is installed. 3. Make a backup of the registry. To do so, type the following commands at the command prompt, pressing ENTER after each command: " attrib -s -h -r *.dat copy user.dat user.sav copy system.dat system.sav " (without the quotation marks) For more information about backing up the registry, see the following article in the Microsoft Knowledge Base: Q132332 How to Back Up the Registry 4. To export the registry to a text file, type the following command at the command prompt, and then press ENTER: " regedit /e registry.txt " (without the quotation marks) This command exports both the System.dat and User.dat files. By default, the Registry.txt file is saved in the folder from which you run Registry Editor. To export a specific registry key to a text file, type the following command at the command prompt, and then press ENTER " regedit /e regkey.txt " (without the quotation marks) where is the key you want to export. For example, type the following command: " regedit /e regkey.txt "HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\ Microsoft Office\95\Microsoft Network" " (without the quotation marks) NOTE: This line is wrapped for readability. This should be typed as one line. 5. Using a text editor (such as Edit.com), modify the Registry.txt file you created in step 4, and then save and close the file. 6. To merge or import the text file back into the registry, type the following command at the command prompt, and then press ENTER: " regedit registry.txt [without /c] " (without the quotation marks) If you want to create a new registry from the exported text file and replace the existing registry files, type the following command at the command prompt, and then press ENTER: " regedit /c registry.txt " (without the quotation marks) Creating a new registry file from exported text can be used as a troubleshooting technique to repair a damaged registry. For more information about troubleshooting registry problems in real mode, see the "Using Real-Mode Registry Editor" section of the following article in the Microsoft Knowledge Base: Q131431 How to Troubleshoot Registry Errors in Windows 95 The changes take effect the next time you start Windows 95. If the changes you make cause problems in Windows 95 or you want to revert to the registry before you made the changes, restart your computer, press the F8 key when you see the "Starting Windows 95" message, and then choose Safe Mode Command Prompt Only from the Startup menu. At the command prompt, type the following commands, pressing ENTER after each command: " cd\ attrib -s -h -r *.dat ren user.dat user.bad ren system.dat system.bad copy user.sav user.dat copy system.sav system.dat " (without the quotation marks) NOTE: If user profiles are enabled in Windows 95, the above procedure only changes the User.dat file in the Windows folder. It does not make any changes to the User.dat file in the \profiles\ folder, (where is the name you use to log on to Windows 95. If you want to modify only the System.dat or User.dat file, or if there is a problem working with both the User.dat and System.dat file in one registry file, there are switches you can use that enable you to work with specific files. For information about problems with importing a registry with large keys, see the following article in the Microsoft Knowledge Base: Q132064 REGEDIT May Not Be Able to Import Registry with Large Keys The following procedure gives the commands for changing step 4 above, which exports the entire registry, and step 6 above, which imports the text file (in this instance, the User.dat file): Step 4: To export the User.dat file to a text file located in the root folder, type the following command at a command prompt, and then press ENTER: " regedit /l:c:\windows\user.dat /e c:\user.txt " (without the quotation marks) Step 6: To merge or import the User.txt file back into the registry, type the following command: " regedit /l:c:\windows\user.dat c:\user.txt [without /c] " (without the quotation marks) If you want to create a new User.dat file from the exported text file, thereby replacing the existing User.dat file, type the following command at a command prompt, and then press ENTER: " regedit /c registry.txt " (without the quotation marks) Syntax ------ The syntax and command-line switches for using Regedit to import to, create, or export from the registry in real mode are as follows: To merge or import a text file into the registry, use the following command: " regedit [/L:system] [/R:user] filename1 " (without the quotation marks) To create and replace an existing registry from a text file, use the /c switch as follows: " regedit [/L:system] [/R:user] /C filename2 " (without the quotation marks) To export text from the registry, use the /e switch as follows: " regedit [/L:system] [/R:user] /E filename3 [regpath] " (without the quotation marks) To see this list, type "regedit /?" (without the quotation marks) at the command prompt. Additional query words: ====================================================================== Keywords : kbtool Technology : kbWin95search kbZNotKeyword3 Version : : ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. 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