Hi Big Den,
Bonjour is Apple's printer service for windows. Check this
for more information about bonjour.
Honestly I am not familiar with your printer Brand nor model but the basic aspects of printer troubleshooting is quite the same so I will try to help you out.
Issues may be from either the P-rinter, C-onnection, D-river, A-pplication.
Is the printer working properly on the other computer in your home network?
Does printing on a regular application notepad always works or you get the error even in notepad?
Are you using the latest driver found here
You may be right about the sleep timer but it is only set to 1 minute.
Do you have a 3rd party firewall or an Internet Security Suite installed on your computers?
Edited by booterbotter , 22 June 2011 - 12:48 PM.