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Register a new account. Sign in Already have an account? Sign In Now. Go to topic listing. Upgrade to Microsoft Edge to take advantage of the latest features, security updates, and technical support. This article describes the Windows registry and provides information about how to edit and back up it. A central hierarchical database used in Windows 98, Windows CE, Windows NT, and Windows used to store information that is necessary to configure the system for one or more users, applications, and hardware devices.
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.
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. Expand all Collapse all sort by most recent sort by thread.
Whoever did this is under the mistaken impression that by putting these registry keys into the. Broadcom Employee. Migration User. Posted AM. Reply Reply Privately Options Dropdown. Posted PM. Default hive under HKU, it will be "inherited" by each new user on that machine. Default hive under HKU refers to the account that has desktop control when no one is logged in. In order to install registry entries into the default user account that is used as the template for each new user logging on to the machine for the first time, where no roaming profiles are used, you need to load the NTUSER.
So this change has zero effect on new user accounts.
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