The Windows Registry is a centralized hierarchical database used by Windows to store system settings, hardware configurations, and user preferences. The Windows Registry can be explored using a program called the “Windows Registry Editor,but modifying the wrong key can cause your computer to become unbootable, so it is recommended that you use it only when necessary.
When making a change to the registry, it is recommended that you first create an export of the entries you are going to modify. This allows you to save the information to a registry file or .reg file, so that if a problem occurs, you can import the original settings back into the registry.
If you need to import the data back into the registry and replace any existing settings, simply double-click the registry file and allow the changes to be merged when prompted by Windows.
Below you will find two ways you can use to extract data from the Windows registry.
Export Registry Key using Windows Registry Editor
For most people, the easiest method to export a registry key is to use the Windows Registry Editor.
The Windows Registry Editor, also known as regedit.exe, is a graphical tool that allows you to modify the Windows registry. To open the Registry Editor, type regedit in the Start menu search field, as shown below, and then select Registry Editor.
When Registry Editor opens, navigate to the key you want to export. In our example, we will export the management key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory.
Then, in the key you want to export, right-click the key name and select Export.Windows will prompt you for a location and file name where you want to save the registry information.
Select the location, enter a file name, and press the Save button.
After saving the registry file, you will see a file ending with the .reg extension in the location where you saved it. This file can be used in the future to restore the settings, if necessary.
Export a Registry Key using the Reg command
Windows includes the reg.exe program that can be used to manipulate the Windows registry from the command line. To use this tool, you will need to open an Elevated Command Prompt.
Once CMD is open, you can use the reg.exe command to extract a registry key using the following syntax:
reg export [key] [file_name]
For example, to export the following registry key “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management” to the test.reg file, you would use the following command:
reg export “HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\Session Manager\Memory Management” test.reg
Once the command is executed, a file will be created, which in our case is test.reg, which contains the extracted registry key.
