TAILIEUCHUNG - Windows Internals covering windows server 2008 and windows vista- P22

Windows Internals covering windows server 2008 and windows vista- P22: In this chapter, we’ll introduce the key Microsoft Windows operating system concepts and terms we’ll be using throughout this book, such as the Windows API, processes, threads, virtual memory, kernel mode and user mode, objects, handles, security, and the registry. | Control UAC virtualization technology discussed in Chapter 6 but it applies to write operations as well. It applies if the following are true The application is a legacy application meaning that it does not contain a manifest file compatible with Windows Vista or Windows Server 2008 with the requestedExecutionLevel value set. The application is trying to modify a WRP-protected resource the file or registry key contains the TrustedInstaller SID . The application is being run under an administrator account always true on systems with UAC enabled because of automatic installer program detection . WRP copies files that are needed to restart Windows to the cache directory located at Windows winsxs Backup. Critical files that are not needed to restart Windows are not copied to the cache directory. The size of the cache directory and the list of files copied to the cache cannot be modified. To recover a file from the cache directory you can use the System File Checker tool which can scan your system for modified protected files and restore them from a good copy. System Hive Corruption Symptoms If the System registry hive which is discussed along with hive files in the section The Registry in Chapter 4 is missing or corrupted Winload will display the message Windows could not start because the following file is missing or corrupt WINDOWS SYSTEM32 CONFIG SYSTEM on a black screen after the BIOS POST. Causes The System registry hive which contains configuration information necessary for the system to boot has become corrupt or has been deleted. Resolution Boot into the Windows Recovery Environment choose the Command Prompt option and then execute the chkdsk command. If the problem is not corrected obtain a backup of the System registry hive. Windows makes copies of the registry hives every 12 hours keeping the immediately previous copy with a .OLD extension in a folder called Windows System32 Config RegBack so copy the file named System to Windows System32 Config. If

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