Hi I'm sorry you have this issue.
When they Windows 10 was installed your printer also now need a compatible driver. Its pretty easy to install and can be found here at the website below.
Please visit: http://support.lexmark.com/index?productCode=LEXMARK_X4850&page=product&locale=EN&userlocale=EN_US#1
Please let me know if you have any trouble with this.
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I will still be here in case you need me further your question will NOT close when you rate until you are satisfied.
Thank you and have a nice afternoon!
Hi the restart may help. But restart your computer and the printer ;-)
Please rate kindly it is the only way I am credited for my time with you;-)