[Petya V4sechkin]

KB2481109

After you install this security update on a Windows XP-based computer, you may receive an error message that resembles the following: Код: :5.375: FileVersion of C:\WINDOWS\system32\mstscax.dll is Less Than 6.0.6001.0 for QFE branch This problem only affects Windows XP based computers that were updated by using updates to address specific issues that are not delivered by Windows Update. For example, computers that have "Limited Distribution Release" (LDR) branch updates installed. To work around this problem, use either of the following methods: Uninstall security update 956744 , and then install security update 2481109. Alternatively, if you already have security update 956744 installed, you can install hotfix 967885 . Then you can successful install security update 2481109.

По-русски: либо удалите обновление KB956744 (в "Установке и удалении программ"), либо поставьте хотфикс KB967885 (после этого проблем с KB2481109 быть не должно).