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How to Change a Network Name in Windows How to Fix Corrupt Registry in Windows Your Privacy Rights. To change or withdraw your consent choices for Lifewire. Each registry value stored in a registry key has a unique name whose letter case is not significant. Registry values may contain backslashes in their name but doing so makes them difficult to distinguish from their key paths when using some legacy Windows Registry API functions whose usage is deprecated in Win In this sense, the entire registry was like a single associative array where the registry keys in both the registry sense and dictionary sense formed a hierarchy, and the registry values were all strings.
When the bit registry was created, so was the additional capability of creating multiple named values per key, and the meanings of the names were somewhat distorted. Each value can store arbitrary data with variable length and encoding, but which is associated with a symbolic type defined as a numeric constant defining how to parse this data. The standard types are:. Technically, they are predefined handles with known constant values to specific keys that are either maintained in memory, or stored in hive files stored in the local file system and loaded by the system kernel at boot time and then shared with various access rights between all processes running on the local system, or loaded and mapped in all processes started in a user session when the user logs on the system.
The Windows Logo Program has specific requirements for where different types of user data may be stored, and that the concept of least privilege be followed so that administrator-level access is not required to use an application. Our websites may use cookies to personalize and enhance your experience. By continuing without changing your cookie settings, you agree to this collection. OK Don't track me.
IT professionals can learn about Windows Registry. The registry contains two basic elements: keys and values. Registry Keys Registry keys are similar to folders — in addition to values, each key can contain subkeys, which may contain further subkeys, and so on.
The Registry contains information that Windows continually references during operation, such as profiles for each user, the applications installed on the computer and the types of documents that each can create, property sheet settings for folders and application icons, what hardware exists on the system, and the ports that are being used. The Registry replaces most of the text-based. Although the Registry is common to several Windows operating systems, there are some differences among them.
A registry hive is a group of keys, subkeys, and values in the registry that has a set of supporting files that contain backups of its data. The file name extensions of the files in these folders indicate the type of data that they contain. Also, the lack of an extension may sometimes indicate the type of data that they contain.
In Windows 98, the registry files are named User. In Windows Millennium Edition, the registry files are named Classes. The following table lists the predefined keys that are used by the system.
The maximum size of a key name is characters. Many of the bit keys have the same names as their bit counterparts, and vice versa. For more information about how to view the registry on Bit versions of Windows, see How to view the system registry by using bit versions of Windows. The following table lists the data types that are currently defined and that are used by Windows.
The maximum size of a value name is as follows:. Long values more than 2, bytes must be stored as files with the file names stored in the registry. This helps the registry perform efficiently. The maximum size of a value is as follows:.
Before you edit the registry, export the keys in the registry that you plan to edit, or back up the whole registry. If a problem occurs, you can then follow the steps in the Restore the registry section to restore the registry to its previous state.
To back up the whole registry, use the Backup utility to back up the system state. For more information about how to use the Backup utility to back up the system state, see the following articles:. Back up and restore your PC. How to use the backup feature to back up and restore data in Windows Server To modify registry data, a program must use the registry functions that are defined in Registry Functions. In the Windows 3. INI configuration files that were scattered across the OS.
The registry can now be used by all programs, and it helps bring together the settings that would otherwise be scattered in many different locations across the disk. Not all programs store all their settings in the Windows registry. Each program developer can decide to use the registry for every setting, just a few settings, or no settings.
Some programs store all or just some of their settings in configuration files—for example, under your Application Data folder. But Windows itself makes extensive use of the registry. Most Windows users will never need to touch the registry. However, you can edit the registry yourself with the Registry Editor, included with Windows. It lets you click through the registry and change individual registry settings.
Some things you can only achieve by hacking the registry. Other settings are available in Group Policy on Professional editions of Windows , but you can usually change them in a Home edition of Windows by tweaking the registry. We generally recommend backing up the registry and your computer , which you should always have backups of! But if you follow legitimate instructions properly, you will not have a problem. Editing the registry is pretty simple. This gives the Registry Editor the ability to modify system settings.
Navigate to whatever key you need to modify in the left pane. To change a value, double-click it in the right pane and enter the new value. In other cases, you may need to create new keys folders. The registry hack will tell you what you need to do.
You can also edit the registry by downloading and running. You should only download and run. Better yet, you can make your own registry hack files.
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