[Vadikan]

CoooLLer

она делается либо автоматом при установке "правильных" приложений, в которые заложено создание этой точки, либо вручную.

Вообще я редко замечал что установщик какой либо програмы делает точку восстановления.

На самом деле, установщик приложений никаких точек восстановления не создает. Все точки создаются исключительно службой System Restore. Она отслеживает изменения в системе и автоматически создает точку восстановления при определенных событиях.

Automatically Created Restore Points Restore points are created to allow users to choose previous system states. Each restore point gathers the necessary information needed to restore to a precisely chosen system state. They are created before key changes are made to the system. Since these restore points are automatic, users don't even have to think about creating manual restore points (unless they choose to). The following topics describe the triggers that cause this feature to create a restore point. Event-triggered restore points System Restore will automatically create a restore point before the following events: * Application installations (provided the application utilizes a current installer that is System Restore RestorePT.API compliant). In the event the application causes harm to the user's system, choosing a restore point before the application was installed allows the user to roll the system state back to the time before the installation of the application, if needed. * AutoUpdate installation. The Auto/Industry Update feature of Windows XP provides an easier way for users to download critical Microsoft Windows® updates in an unobtrusive way. Once the update is downloaded, the user is presented with the opportunity to install the update on the user's system. When the user chooses to install the update, the System Restore feature will create a restore point before the actual installation of the update begins. If the user restores after files are downloaded but before the installation of the update occurs, the downloaded files will not be removed by the restore operation. * Restore operation. If a user, for example, accidentally chooses the wrong system state to restore back to, the user can, by choosing a restore point before this operation, undo the restore operation. The user can then choose the correct restore point. The restore operation itself will create a restore point for undo purposes. Note Only administrators or owners can restore. * Microsoft Backup Utility Recovery. Before Microsoft Backup Utility performs a backup recovery, System Restore will create a restore point. In the event the recovery is cancelled or leaves the system in an undesirable state, users can use this restore point to revert the system to the point before the recovery started. * Unsigned driver installation. Unsigned device driver installations are detected by the INF installer of Windows. Before the installation proceeds, a restore point is created so in the event the installation results in a harmful impact to the system, users can restore to the point immediately before the unsigned driver installation. * Manual Restore points. At any time, users (administrator/owner users only) may create and name an on-demand restore point. This is useful to create a "checkpoint" to return to preceding a particularly risky change, before a shared system is left to other users, or at a particular state the user perceives to be optimal.

Windows XP Technical Articles
Microsoft Windows XP System Restore