What is the actual error you get in check printing? Do you have Windows Updates set to both download and install? 

Hi.  Recent Windows Update 10 has caused check printing to stop..apparently no error message.  Could you advise? We rolled back the windows updates but still not printing. Thanks

Is it A/P or Payroll Check Printing? Do you have Electronic Delivery / Paperless Office setup for it? If so, as @Kevin Moyes has mentioned, Windows Updates seem to consistently reset the permissions of a particular registry key, that being: HKEY_CURRENT_CONFIG\Software\Sage 100 PDF Converter

Have your IT review the permissions on it and then reset that key and all objects below it to Full Control. Hope that helps.