Here is an update of what I have done. Removed the internet connection (USB), Uninstalled the Anti-virus software (McAffe Live safe), When it happens I 've looked inside the CNC Control cabinet and felt the capacitor, motion controllers (they were cool), Felt axis motors(they were cool), looked inside the PC and didn't see anything wrong. So it is happening more often now. One thing I did notice was when the "X" and "Y" axis starts to shake I grabbed the "X" axis hand wheel to see if I could stop it and I couldn't. I did feel though at times as if the axis motor wasn't locked up for a short interval and then it would lock back up. So one of my thoughts here is if the mill becomes labored with a plugged tooth (haven't seen it)or whatever, in other words the axis motors is pushed to its limits would this cause the problem. I'm guess I'm going to have to try a different computer. Anybody have any thoughts?
Pat