If the file is protected, WFP looks up the file signature in a catalog file to determine if the new file is the correct version. After WFP receives this notification, WFP determines which file was changed. This protection is triggered after WFP receives a directory change notification for a file in a protected directory. The first mechanism runs in the background. The WFP feature provides protection for system files using two mechanisms.
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The Windows Installer adheres to WFP when installing critical system files and calls WFP with a request to install or replace the protected file instead of trying to install or replace a protected file itself. If a program uses a different method to replace protected files, WFP restores the original files. Operating system upgrades using Winnt32.exe Hotfixes installed using Hotfix.exe or Update.exe Windows Service Pack installation using Update.exe Replacement of protected system files is supported only through the following mechanisms:
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WFP uses the file signatures and catalog files that are generated by code signing to verify if protected system files are the correct Microsoft versions. WFP protects critical system files that are installed as part of Windows (for example, files with a. Protecting these files prevents problems with programs and the operating system. Programs must not overwrite these files because they are used by the operating system and by other programs. Windows File Protection (WFP) prevents programs from replacing critical Windows system files. This article describes the Windows File Protection (WFP) feature. The Windows XP registry files are very delicate to work with, so make sure that you are taking absolute care when manipulating these files.Description of the Windows File Protection feature These files can get corrupted just like any other files and knowing where they are located can help in troubleshooting many issues in the future. By knowing this information, you can understand how a registry works with the operating system. So you can see the logic behind the registry editor with the structure and location of the Windows XP registry files. From there, you would be able to copy the registry files from the “repair” folder to the system32/config directory. One way to fix this problem is to use the Windows CD to get into the recovery console. These usually will come in handy when you get bootup errors and need a find a clean copy of the registry.
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These files are located in the %systemroot%/repair directory. HKU.DEFAULT: Default, Default.log, Default.savĪnother thing to mention is that there is a “repair” copy just in case your registry gets corrupted. HKLMSystem: System, System.alt, System.log, System.sav HKLMSoftware: Software, Software.log, Software.sav HKLMSecurity: Security, Security.log, Security.sav HKCC: System, System.alt, System.log, System.sav sav: This is an automatic backup created from when a setup or program installation occurs. log: A log of changes that have occurred within the registry hive alt: An alternate copy of the registry hive In the registry, there are 5 groups: HKEY_CLASSES_ROOT(HKCR), HKEY_CURRENT_USER(HKCU), HKEY_LOCAL_MACHINE(HKLM), HKEY_USERS(HKU), and HKEY_CURRENT_CONFIG(HKCC).įor the corresponding hives, you will see several types of extensions: no extension.
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Hives are a collection of keys, subkeys and values that contain the configurations for the operating system and programs. In the registry, there are hives that correspond to several files. This article will help you understand how the Windows XP registry files correspond with the hierarchial structure. Within the Windows XP registry files are the structure of the hives and corresponding location of each hive. The Windows XP registry files are located in the %systemroot%/system32/config directory where %systemroot% is usually WINDOWS or WINNT. In every computer, the registry is saved in separate files in the windows directory.