A system and method for mitigating memory errors in a computer system. It is a problem that such information carriers may become lost or stolen and subsequently redeemed by others. The DPF is heated and regenerated only when an operating state of the engine is in an area where temperature-increasing efficiency is high, in the case where a quantity of particulate matters collected by the DPF is equal to or greater than a first threshold and is less than a second threshold. Based on an area and time frame in which a corresponding credit card or the like is used, the number of points is determined, and is then used to set an authentication level. Administrative services operations continue to be performed by the physical IO adapter when the data access DMA capabilities of the physical IO adapter are disabled.