Don’t risk your computer’s security or your printer’s functionality for a “free” tool. If you can’t afford a service center, look into with positive user reviews – they cost less than replacing a broken printer.
Some third-party developers have created to Canon’s official tool. These are legal to purchase and often cost $15–$25. Examples include: Canon Service Tool St 5510 Free Download
There is currently provided by Canon Inc. for the free download of Service Tool ST5510. Don’t risk your computer’s security or your printer’s