The Registry Editor can not only run in Windows, but also run in MS-DOS real mode. Sometimes the registry is damaged and unable to start Windows, we only fix or modify the registry in DOS mode. The actual physical file of the registry is System.dat and User.dat, which also said that the data in the registry is saved in both files. Export Registry This command can be backed up for the registry file. Command format: regedit / L: System / R: user / e filename.reg regPath parameter meanings: / l: system specifies the path where the System.dat file is located. / R: User specifies the path where the user.dat file is located. / E: This parameter specifies that the registry editor is to export registry operations, in which the parameters are empty, enter the file name of the export registry. RegPath: The branch used to specify which registry to export, if not specified, the full registry branch will be exported. If you plan to save in C: /Windows/system.dat and save all HKEY_CLASSER_ROOT root keys in C: /Windows/Profiles/User.dat Export to File.REG, you can do the following command: regedit / L: C: / Windows / / / / / / / e file1.reg hkey_classer_root Import registry command format: regedit / l: system / r: user file.reg parameter meanings: / l: system specified system.dat The path where the file is located. / R: User specifies the path where the user.dat file is located. Reconstruction Registry Reconstruction Registry, re-establish System.dat and User.dat files. Command format: regedit / L: System / r: user / c file.reg parameter meanings: / l: system specifies the path where the System.dat file is located.
