Tệp REG là gì trong Windows? Cách mở và đọc nội dung tệp REG

You often hear about the concept of REG files in Windows. However, do you clearly understand what a REG file is? What is its function, and how to open and read its contents? The article below will reveal the details about REG files to you.

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What is a REG file in Windows?

A REG file is a text file with the extension .reg. They are a type of file that contains Windows Registry data, created by exporting selected keys from the Registry. REG files can include hives, keys, and values. They can be created from scratch in a text editor. Or they are automatically created when the Windows Registry is backed up. REG files are used to add or change values in the Registry. In other words, any discrepancy between the REG file and the Windows Registry will result in the addition or removal of related keys and values.

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REG is a file type that contains Windows Registry data.

Now that you know what a REG file is, you know that it is where the Windows Registry is located. This is a database that contains configuration information and settings for the Windows operating system. It is an important part of the system. It stores information such as software program settings, system configuration, user preferences, and other parameters related to how the system operates. Another way to think of the Windows Registry is that it is like the “DNA” of Windows.

For example, when a new program is installed, a new set of instructions and file references can be added to the Windows Registry. It is added in a specific location for the program. Other sets can interact with it, to refer to additional information such as where the files are located, what options are used in the program, etc.

What is the REG file structure?

REG file structure is a form of text format. They are used to store configuration information in the Registry of Windows operating system. Basically, REG files contain instructions for the Registry. They describe the specific modifications that the system will make in the Registry when this file is imported. It is an important component for managing system settings.

The structure of a REG file uses special characters and delimiters. These two elements mainly define the structure of the REG file. They help the system understand how to parse and execute the instructions correctly. The REG file also includes data blocks that correspond to keys and values in the Registry. Each instruction is usually related to a specific key and may contain values or other configuration information.

The example code below describes an instruction in a REG file:

[HKEY_CURRENT_USER\Software\ExampleKey]“ExampleValue”=”Hello, World!”

Here, this instruction adds a key named “ExampleKey” to the Registry under the path “HKEY_CURRENT_USER\Software\”. The value is “Hello, World!”. So you understand what the REG file structure is.

Sample REG file structure

What are REG files used for?

The Windows Registry contains a lot of important information and settings. This information is related to software programs, hardware devices, user preferences, and operating system configuration. So what exactly is the purpose of the REG file containing the Windows Registry? REG files, also known as Windows Registry files. They are used to make changes in the Registry of the Windows operating system.

Add, modify, or delete keys and values.
Change configuration, optimize system according to specific needs.
Deploy settings and options in an enterprise environment.
Backup and restore system configuration. This helps users restore previous settings if necessary.

REG is used to make changes in the Registry of the Windows operating system.

By understanding “what is a REG file,” users can take advantage of REG files to manage and adjust system configurations. However, it should be noted that editing the Registry requires caution. This is to avoid causing unwanted problems in the system. Editing it can affect the way the system operates. Normally, users should only make changes to what is a REG if they understand the consequences of such changes and only do so when necessary or under the guidance of an expert.

How to open and read the contents of a REG file?

There are a number of ways you can open and read the contents of a REG file. It depends on your preferences and specific use case. Below is a detailed description of the different methods.

Using a text editor

Using a text editor is a convenient and flexible means of displaying and interacting with the contents of a REG file in the way you want. This allows you to navigate through the instructions and Registry structure with ease. It also allows you to make edits to your specific needs. Here’s how:

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Step 1: You choose the editor for what is the REG file and double click on it. The system will automatically open this file in the default editor. For example, it can be Notepad or another custom editor if you have installed.

Use Notepad to read REG

Step 2: The text editor will display the contents of the REG file in a structured manner. Here, you can see detailed instructions about the keys and values in the Registry.

Step 3: If needed, you can edit the contents of the REG file. This allows you to make custom changes, such as adding, modifying, or removing keys and values. Remember to save any changes before closing the editor.

Using Command Prompt

When you need to quickly view and check specific information in a REG file without opening a text editor, Command Prompt is a quick and flexible tool that you can take advantage of. Here are detailed instructions on how to use this tool.

Step 1: Press the `Win + R` key combination, type `cmd`, and press Enter to activate the Command Prompt command. A black screen will open, waiting for your interaction.

Step 2: At the Command Prompt, type `type path_to_file.reg` or `more path_to_file.reg`. Make sure you replace “path_to_file” with the full path of the REG file you want to check.

Command Prompt edit REG

Step 3: Press Enter to have Command Prompt display the detailed contents of the REG file. You will get an overview of the instructions and information in the Registry that the file contains. This makes viewing directly quick and convenient, especially when you just want to view it without opening a text editor.

This is an efficient way to explore and check instructions in the Registry. It also does not disturb your work process.

Open with Registry Editor

Registry Editor is a powerful and flexible tool. It helps you to perform the process of importing and examining the contents of REG files in detail. To use Registry Editor, you need to perform the following steps:

Step 1: First, to start Registry Editor, you need to press the Win + R key combination to open the Run dialog box. In the Run box, type “regedit” and press Enter to open Registry Editor.

Step 2: In the Registry Editor, select File from the menu bar, then select Import from the drop-down menu. A file open dialog box will appear. Browse to the location of the REG file you want to open, select it, and click Open.

Step 3: Once you have selected what the REG file is, Registry Editor will confirm the import of the contents of the REG file into the Registry. Here, you can view and examine the details of the instructions in the file. This will give you a better understanding of the changes that the REG file will make in the Registry.

Registry Editor displays REG files

Note that editing the Registry can affect your system, so be careful when working with Registry Editor. If you are unsure about a change, learn more or seek help from a professional.

What is the storage location of REG files in Windows?

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Windows uses a complex and hierarchical REG (Registry) file storage system to manage system and application configuration. Here is a more detailed look at the main storage locations of REG files in the Windows operating system.

System level: C:\Windows\System32\config. This location contains the system-level Registry hives. It includes hives such as SOFTWARE, SYSTEM, and SAM.
User Specific: C:\Users\UserName\NTUSER.DAT. This location stores the Registry files specific to each user. Each user has their own NTUSER.DAT file.
System specific (SOFTWARE): C:\Windows\System32\config\SOFTWARE. Contains configuration information for software and systems.
Application specific. What the REG file path is will depend on the application’s settings. Some applications may create their own REG files to store their specific settings.
The classic Registry folders: HKEY_CLASSES_ROOT, HKEY_CURRENT_USER, HKEY_LOCAL_MACHINE, HKEY_USERS, HKEY_CURRENT_CONFIG. These are Registry “hives” displayed in a hierarchical tree structure. Each hive contains a portion of the Registry with specific settings.

Location C:\Windows\System32\config to save the REG file

Notes when changing REG files

When making changes to Windows REG files, it is important to be careful and understand the impact those changes will have on your system. Here are some important things to keep in mind before making any REG modifications.

Full backup

Before making changes to the Registry, it is important to create a complete backup. This step ensures the ability to restore the entire system if problems arise after making changes. For effective backup, use the built-in or third-party system backup tool. It will help create a complete backup of the Registry. It includes hives, keys, and values.

Full backup

Note that the backup should be stored in a safe location. It should not be on the drive that contains the operating system. This is to ensure access if the drive that contains the operating system fails. Check the integrity of the backup and perform regular backups. This will keep the information up to date and reflect new changes. Use system management tools or Registry management software to manage backups across your entire network if you are a system administrator.

Only do this if you understand the risks of changing the REG file.

It is important that you understand what you are doing. Each instruction in the REG file can change the configuration of your Windows system. If performed incorrectly, it can cause problems for your computer. To avoid risks, you should only make changes if you understand each instruction in the REG file. This requires a basic understanding of the structure of the Windows Registry, including how it is organized into keys and values, and how these values affect the system.

Only do this if you understand the risks of changing the REG file.

If you are unsure, learn more about the structure of the Registry and REG. There are many downloadable resources that explain this in detail. Having a solid understanding of this will help you feel more confident working with the Windows Registry and REG files.

Restrict changes to system level

An important rule of thumb when making changes is to limit tampering with system-level values. System-level values are important settings that the system uses to maintain proper operation. Careless changes can lead to system recoverability issues, unexpected errors, or even reduced performance. This may be something you are not familiar with.

Restrict changes to system level

Before making any changes, it’s important to have a good understanding of the system-level values you’re messing with. What a REG is, and what REG values are used to represent important entries in the Registry. Understanding these values helps you make informed decisions about whether to make or avoid specific changes.

Check the effectiveness after change

After you have completed the change process, the most important thing is to perform a post-change test of the REG file to see if there are any problems. This ensures that the system is still working properly, without any problems appearing. You can perform the following steps to ensure the stability of the system:

Rebooting after changes helps apply the adjustments and put them into effect. Ensures the system boots without any significant issues.
Open and use important applications. Also test basic system functions.
Perform normal system operations and check for stability. Surf the web, open files, and perform other tasks to ensure that the system does not encounter any significant problems.
Open Event Viewer to check if any error or warning messages appear.

Use Event Viewer to check after changing REG file