You run Windows XP on a computer that has a universal serial bus (USB) card reader. You install a Microsoft USB smart card class driver (Usbccid.sys) on the computer, and insert a smart card into the USB card reader. A service or application transmits a large amount of data from the smart card. In this scenario, the system crashes and you receive the following Stop error message: Stop 0x000000D1 (parameter1, 00000002, 00000001, parameter4) DRIVER_IRQL_NOT_LESS_OR_EQUAL. Note The parameters in this Stop error message vary, depending on your actual configuration. To fix this, customer need to contact Microsoft to obtain the hotfix, explained Microsoft in KB967048.