Abstract: The invention relates to a virus protection and a computerized equipment (10) utilizing the protection. Every executable data file (32) is provided unique by adding an electronic signature in the end of every file (44), which is generated with a computer program/algorithm (28) for that purpose, with a predetermined number of bits. It comprises that no data files (32) without signature are admitted execution in the computer. A key (30) is individually generated in every computerized equipment (10), utilized by the algorithm (28) to create the unique signature (44) for every single data file (32), by utilizing the contents of the data files (42).

Abstract: The invention relates to a sensor and assembly comprised in a housing for a hand-held and hand-operated printing device controlled by a processor, and a method therefor. It provides a hardware solution to speed up a print-out with said assembly.