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Microsoft occasionally pushes updates that break legacy drivers.
Starting with Windows 10 Anniversary Update, Microsoft enforced stricter driver signing. The CP105b’s last official driver (v2.1.0 from 2015) used a SHA-1 certificate that expired in 2017. On a fully updated Windows 10/11 system, the OS refuses to install it unless you disable Secure Boot and Driver Signature Enforcement—a significant security risk.
The may seem like a small piece of software, but it is the lifeline of your Fuji Xerox DocuPrint CP105b. While finding the correct driver today requires navigating Fujifilm’s merged support portals, the effort pays off in stable, vibrant color printing.
