Service Tool v5306 is older software designed for 32-bit versions of Windows (like Windows XP or Windows 7). Modern Windows 10 and Windows 11 systems run on 64-bit architecture and have stricter security protocols (Driver Signature Enforcement) that block the tool from communicating with the printer.
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Look at the "Clear Ink Counter" section in the software interface. Set the counter. Click the Set button right next to it. Service Tool v5306 is older software designed for