How to get data from an HMI to another PC

I have an HMI run in one PC (say job-set PC) of Corrugator machine having Window NT installed. HMI run in “FIX HMI” software which is not OPC complaint. Normally operator put all the data in the HMI of job-set PC. Now I want to get information from HMI of job-set PC to another PC but don’t know how to achieve it. Does any body have any idea to do that?

How this PC is attached with machine I mean by Ethernet or Profibus or by serial port. You need to take image of its hard disk and install on other PC but you will also need to communicate this PC to machine to get actual data.