Sign up or log in Sign up using Google. Sign up using Facebook. Sign up using Email and Password. Post as a guest Name. Email Required, but never shown. The Overflow Blog. Does ES6 make JavaScript frameworks obsolete? Podcast Do polyglots have an edge when it comes to mastering programming Featured on Meta. Now live: A fully responsive profile. 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. Managing Updates in 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. Administrators can modify the registry by using Registry Editor Regedit.
We recommend that you use the Windows user interface to change your system settings instead of manually editing the registry. However, editing the registry may sometimes be the best method to resolve a product issue. If the issue is documented in the Microsoft Knowledge Base, an article with step-by-step instructions to edit the registry for that issue will be available.
We recommend that you follow those instructions exactly. Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system.
Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk. The navigation area of Registry Editor displays folders. Each folder represents a predefined key on the local computer. Microsoft Management Console MMC hosts administrative tools that you can use to administer networks, computers, services, and other system components. You're in! Thanks for signing up.
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