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Troubleshooting

Restoring a Corrupt Registry
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Restoring a Corrupt Registry

A backup of both Registry files is created at every system startup. These backups are located in the Windows folder as SYSTEM.DA0 and USER.DA0. Booting from a floppy and renaming SYSTEM.DA0 to SYSTEM.DAT and USER.DA0 to USER.DAT can easily restore a corrupt registry. If all else fails, a copy of your original registry that was created during Windows 95 Setup is stored in the root directory as SYSTEM.1ST.

SYMPTOMS

When you start Windows 95 you may receive the following error message:

There is not enough memory to load the registry.
CAUSE

This error message may occur if the system registry on your computer is damaged.

RESOLUTION

To restore a damaged registry file, use any one of the following methods.

Using Real-Mode Registry Editor

You can use Registry Editor in real mode to export, then import the registry file. To do so, follow these steps:

1. Restart the computer. When you see the "Starting Windows 95" message, press the F8 key, then choose "Safe mode command prompt only" from the Startup menu.
2. Type the following line to export the registry
   regedit /l:(path1) /e (path2)system.txt
   
   where (path1) is the path to the System.dat file and (path2) is the path to the destination file. For example, if Windows 95 is installed in the Windows folder on drive C, type the following line:
   regedit /l:c:\windows\system.dat /e c:\system.txt
3. Type the following lines, pressing ENTER after each line:
   cd\windows
   attrib -s -h -r system.dat
4. Type the following line to rename the current registry file:
   ren system.dat system.old
5. Type the following line to import the registry:
   regedit /l:(path1) /c (path2)system.txt
   where (path1) is the path to the System.dat file and (path2) is the path containing the file to import. For example, if Windows 95 is installed in the Windows folder on drive C and you want to import the System.txt file from the root directory of drive C, type:
   regedit /l:c:\windows\System.dat /c c:\system.txt
6. Restart Windows 95 normally.
   For additional information about using Registry Editor in real mode, please see the following article in the Microsoft Knowledge Base:
   
   ARTICLE-ID: Q131352 TITLE : Using Registry Editor in Real Mode
   If the error continues to occur after you follow the steps in this section, please see the next section.

Using System.da0
You can restore the registry to its state when you last successfully started Windows 95. To do so, follow these steps:

1. Restart the computer. When you see the "Starting Windows 95" message, press the F8 key, then choose "Safe mode command prompt only" from the Startup menu.
2. Type the following command to move to the Windows directory:
   cd \windows
   where "windows" is the Windows 95 folder. For example, if Windows 95 is installed in the Windows folder, type the following line:
   cd \windows
3. Type the following line:
   attrib System.dat -s -h -r
4. Type the following line:
   ren System.dat system.bad
5. Restart your computer. Windows 95 will use the System.da0 file when it cannot find the System.dat file. If this file works, Windows 95 renames it to System.dat.
   
   If the error continues to occur after you follow the steps in this section, please see the next section.

Using System.1st
You can restore the registry to its state when you first started Windows 95 successfully. To do so, follow these steps:

1. Restart the computer. When you see the "Starting Windows 95" message, press the F8 key, then choose "Safe mode command prompt only" from the Startup menu.
2. Type the following command to move to the Windows directory:
   cd \windows
   where "windows" is the Windows 95 folder. For example, if Windows 95 is installed in the Windows folder, type the following line:
   cd \windows
3. Type the following line:
   attrib System.dat -s -h -r
4. Type the following line:
   ren system.dat system.xxx
5. Type the following line:
   cd \
6. Type the following line:
   attrib system.1st -s -h -r
7. Type the following line;
   copy system.1st c:\windows\system.dat
   where "windows" is your Windows 95 folder.
8. Type the following line:
   attrib +s +h +r system.1st
9. Restart your computer.
   If the error continues to occur after you follow the steps in this section, please see the next section.

Reinstalling Windows 95
You can also recreate the registry files by reinstalling Windows 95.

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