You have Printer shared with another PC and it keep goes offline. Problem?
You may find, as I have done recently, that a network printer installed on a Windows 7 starts suddenly showing as Offline even when other machines on the network can access it fine
It turns out that Windows Vista automatically enables SNMP support for networked printers, and if it can’t get a response to a SNMP message then it assumes the printer is offline.
SNMP stands for Simple Network Management Protocol and is a way of getting information from network devices (such as routers, servers and printers), mainly for the purposes of finding out if there are any problems with the devices. A number of networked printers implement SNMP, and will respond to SNMP queries with information, but some don’t.
Do the following Steps