Before using the software, you must put your printer into . Follow these steps carefully:
: Use caution when downloading this tool from unverified sites. Some archived versions have been flagged as containing malware that exploits vulnerabilities. Experts recommend using a dedicated "spare" computer for such tools to protect your main data.
Based on our analysis of Canon Service Tool V3900, we recommend the following:
Searching for "v3900 download hot" often leads to risky third-party sites.
It is best to run the tool on Windows XP or newer Windows versions (Windows 7/10/11) using Compatibility Mode for Windows XP.
: Allows you to view and save detailed internal printer data for diagnosis.