MYOB defaults to NetBEUI when starting up requiring the user to select TCP/IP from a drop down box. Each computer must be assigned an IP address for this protocol to work.

This is for you Anne.

Go to

Control Panel 

Control Panel - Network settings

Control Panel - Network and Internet settings

Network and Internet

Then go to Network and Sharing centre:

Change adapter settings

Change adapter settings

Then right click on the network connection and select properties.

 

Local Area Network Connection Properties
Local Area Network Connection Properties

Now turnoff anything that says NETBEUI, then back out and restart the computer.