Please be informed that, there is no Windows 10 compatible driver for Dell 966 printer. I would suggest you try downloading and install the driver from the link below and check if the issue persists.
If the issue persists, you may have to get another printer in order to work with Windows 10.
If the issue persists, or you have any questions, please be back and let me know.If you appreciate my service, please rate it EXCELLENT by clicking the EXCELLENT (5 Stars) and Submit. My goal is to provide you with excellent service – if you feel you have gotten anything less, please reply back, I am happy to address follow-up questions. Thank you for your business!Thank you!S H E F I N