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MCSA/MCSE Self-Paced Training Kit (Exam 70-270): Installing ...

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Lesson 4 Using Tools to Simplify Deployment<br />

3-37<br />

The USMT consists of two executable files (ScanState.exe, LoadState.exe), and four<br />

migration rule information files (Migapp.inf, Migsys.inf, Miguser.inf, and Sysfiles.inf).<br />

ScanState.exe collects user data and settings based on the information contained in<br />

Migapp.inf, Migsys.inf, Miguser.inf and Sysfiles.inf. LoadState.exe deposits this user<br />

state data on a computer running a fresh (not upgraded) installation of Windows XP<br />

Professional.<br />

See Also For more information on using the USMT, visit http://www.microsoft.com/technet/<br />

prodtechnol/winxppro/deploy/usermigr.mspx.<br />

How to Manage Applications by Using Windows Installer<br />

Windows Installer and installation packages (.msi files) simplify the installation and<br />

removal of software applications. An installation package contains all the information<br />

that the Windows Installer requires to install or uninstall an application or product and to<br />

run the setup user interface. Each installation package includes an .msi file that contains<br />

an installation database, a summary information stream, and data streams for various<br />

parts of the installation. The .msi file can also contain one or more transforms, internal<br />

source files, and external source files or cabinet files required by the installation.<br />

If there is a problem during the installation of a software application, or if the installation<br />

fails, Windows Installer can restore or roll back the operating system to its previous<br />

state. Windows Installer also reduces conflicts between applications by preventing<br />

the installation of an application from overwriting a dynamic-link library (DLL) used by<br />

another application. Windows Installer can determine if an application you installed<br />

using it has any missing or corrupted files, and can then replace them to resolve the<br />

problem.<br />

To preserve users’ disk space, Windows Installer allows you to install only the essential<br />

files required to run an application. It supports the installation of application features<br />

on demand, which means that the first time a user accesses any feature not included in<br />

the minimal installation, the necessary files are automatically installed. Windows<br />

Installer allows you to configure unattended application installations and it supports<br />

both 32-bit and 64-bit applications.<br />

The Windows Installer can advertise the availability of an application to users or other<br />

applications without actually installing the application. If an application is advertised,<br />

only the interfaces required for loading and launching the application are presented to<br />

the user or other applications. If a user or application activates an advertised interface,<br />

the installer then proceeds to install the necessary components.<br />

The two types of advertising are assigning and publishing. An application appears<br />

installed to a user when that application is assigned to the user. The Start menu<br />

contains the appropriate shortcuts, icons are displayed, files are associated with the

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