How to Back Up the Registry
ID: Q132332
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The information in this article applies to:
SUMMARY
This article describes how to back up and restore the Windows 95 registry
files.
MORE INFORMATION
To back up and restore the Windows 95 registry files, use one of the
following methods:
Method 1
To back up your registry files, follow these steps:
- 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 lines, pressing ENTER after
each line:
cd windows
attrib -r -h -s system.dat
attrib -r -h -s user.dat
copy system.dat *.bu
copy user.dat *.bu
NOTE: This procedure assumes you do not have any files named System.bu
or User.bu. If you do have files by this name, such as a backup of the
System.ini file, select a file name extension that is not currently in
use.
- Restart your computer.
To restore your registry files, follow these steps:
- 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.
- Type the following lines at the command prompt, pressing ENTER after
each line:
cd windows
attrib -r -h -s system.dat
attrib -r -h -s system.da0
attrib -r -h -s user.dat
attrib -r -h -s user.da0
ren system.dat system.daa
ren system.da0 system.da1
ren user.dat user.daa
ren user.da0 user.da1
copy system.bu system.dat
copy user.bu user.dat
NOTE: This procedure assumes you do not have any files named
System.daa, System.da1, User.daa, or User.da1. If you do have files by
this name, select a file name extension that is not currently in use.
- Restart your computer.
Notes:
- You may want to back up more than one version of the registry in case
the registry becomes damaged but the damage is not detected until
later. If you want to do this, when you are following the steps above,
replace the .bu extension with .bu1, .bu2, and so on.
- If you have more than one hard disk or a network drive is available,
you may want to copy the backup files to the other drive so the backup
files do not reside in the same location as the original registry
files.
Method 2
You can use the Windows 95 Emergency Recovery Utility to create a backup
of your system configuration and registry files and restore these files in
case a problem should occur.
For information about using the Windows 95 Emergency Recovery Utility,
see the following article in the Microsoft Knowledge Base:
Q139437 Windows 95 Emergency Recovery Utility
Additional Information
Windows 95 stores information about the hardware and software in your
computer in the System.dat and User.dat files. The System.dat and User.dat
files should be treated as a pair. You should back them up together as a
pair and restore them together as a pair. These files are hidden, read-
only files.
Note that if you are using user profiles, you should also backup the
User.dat files located in the following folders
C:\Windows\Profiles\<username>
where <username> is the name of each person that logs on to Windows 95.
If the registry is damaged, various errors may occur, or your computer
may not start properly. For information about troubleshooting registry
problems, see the following article in the Microsoft Knowledge Base:
Q131431 How to Troubleshoot Registry Errors
Additional query words:
Keywords : kbtool win95
Version : WINDOWS:95
Platform : WINDOWS
Issue type : kbhowto
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