A data processing system may have a strict separation of processor tasks and data categories, wherein processor tasks are separated into software loading and initialization (loading processor) and data processing (main processor) and data categories are separated into address data, instructions, internal function data, target data of the main processor and target data of the loading processor. In this way, protection is provided against malware, irrespective of the transmission medium and of the type of malware, and also against future malware and without performance losses in the computer system.