Okay thanks for the replies I will try them all. As for a dedicated computer, that is what I'm doing. I have the Anti-virus software on the computer to help with any virus I may get with the other computer connected to my network. I like to be able to transfer files from the computer running the BobCad V27 software (which has anti-virus softeware installed) to the dedicated CNC computer. Do I need to worry about virus transferring from BobCad computer to the CNC computer? Also Hood do you mean the computer or the controllers overheating? I have cleaned out both of these but didn't look at the capacitors. However it is also something I will do anyways. Thanks for all the help I will let you know what I find out.
Pat
Is either pc on the internet??
No, then you do not need antivirus software.
If the non-cnc pc is on the 'net then i would sever the connection and use a usb drive to transfer the files.
The chances of getting a virus on a cnc pc is bugger all as they usually transfer with word files or audio/picture files etc. Virus software is a major workload on a pc, Norton being one of the worst but any is bad news.
Even the network card itself can be bad news and if not connected should be disabled in windows networking as it will constantly send out packets in search of other computers which it cant reach as its unplugged so it just sends and sends, working the cpu wastefully.
I have no idea if these points will help but ruling out basic stuff is always good i think.