After small number of customer reports Microsoft admitted that is send wrong Vista patch to the wrong users. The update was one of three prerequisites for SP1 unveiled Tuesday and was supposed to go up only on Vista Enterprise and Vista Ultimate machines, since it targeted BitLocker, the full-drive encryption technology bundled with those premium versions of the operating system. Instead, the update was also offered to PCs running Vista Home Basic and Home Premium. As company representatives states customers who installed the initial release of the update on editions other than Ultimate or Enterprise should not be concerned as the update will have no negative impact on their systems.