Autorun functionality is incorporated into a portable device such as a flash drive, a wireless adapter, a communication adapter, or any USB peripheral device. The portable device is connectable to a computing device (e.g. USB). The portable device may act as a security key to protect software or data running on the computing device from unauthorized use. At least part of the protected software or data may be stored in a protected memory component of the portable device which is not accessible by the user. Upon connecting the integrated circuit memory device to the computing device, the at least part of the protected software or data may run automatically on the computing device to enable the function of the protected software or data; whereby the user may run the protected software or data on the computing device while the portable integrated circuit memory device remains connected to the computing device.