[Vadikan]

Absolut

мол она отключена групповой политикой

Ну так в чем проблема?

System MACHINE Administrative Templates\System\System Restore Turn off System Restore Only works on Microsoft Windows XP Professional Determines whether System Restore is turned on or off. System Restore enables users, in the event of a problem, to restore their computers to a previous state without losing personal data files. By default, System Restore is on. If you enable this setting, System Restore is turned off, and the System Restore Wizard and Configuration Interface cannot be accessed. If you disable this setting, System Restore is turned on and enforced. It cannot be turned off in the Configuration Interface, but, depending on the Turn off Configuration settings, it may still be configured. The feature is nonfunctional until the system is rebooted. To turn off the Configuration Interface, see the Turn off Configuration setting. If you do not configure it, the system reverts to the default local setting. Important: This setting only refreshes at boot time. Note: This setting is only available in Windows XP Professional. Also, see the Turn off Configuration setting. If the Turn off System Restore setting is disabled or not configured, the Turn off Configuration setting is used to determine whether the Configuration Interface appears. Код: HKLM\Software\Policies\Microsoft\Windows NT\SystemRestore!DisableSR

!parameter означает: parameter=dword:00000001 (запрещено) или dword:00000000 (разрешено)
Источник: Group Policy Reference