Patent ID: 8248634

Claim:
A job processing system of a multifunction printer comprising: an operation section accepting settings of a job; a generate section generating job data based on settings information related to the settings of the job upon accepting a settings completion in the operation section; a first storage section storing the generated job data; an execution section executing the job based on the generated job data; a detection section detecting computer viruses within the job processing system; a control section deciding necessity of detecting by the detection section based on job data related to the job; and, a second storage section storing the settings information upon accepting the settings completion in the operation section, wherein, the control section carries out the decision of whether or not detection is necessary based on a result of comparing the job data stored in the first storage section and the settings information stored in the second storage section; senses an abnormality when the result of the comparison is not matching; and decides that detecting by the detection section is necessary; and, the detection section carries out the detection when the abnormality is sensed.