This utility can be used under Windows OS on One PC only per One License. In this case You dont need to buy this utility untill you fix hardware problem and can put printer in Service Mode. If You cant put printer in service mode - that means printer has damaged EEPROM and it must be reprogrammed by hardware resetter. Warning! This utility can be used when printer is put in Service Mode only. * This Will not work, if you had already used some fake service tool available in market for FREE, and they had given Error Code 006 on the printer. You can Reset Absorbers counter and other errors: This Canon Service Tool V5105 is used for making printer adjustments and Waste Ink Counters resets. CANON Service Tool V5105 - Lateset 2018 Version!