I have an application (CutRite) on a PC that optimizes cut patterns and then sent to each of the 3 saws. This is done over the COM1 line using an A-B-C switch to switch between saws. The distance out to the saws is around 100 yards plus. Whatever PC I place at that workstation, its operating system gets slowly degraded over time. I replaced the PC that was there and reloaded the original PC from the recovery disks and never had a problem with it since. There are different theories ... one is that the application itself, which is DOS-based, is the culprit. The other is that we are somehow getting feedback from the saws into the computer. We have looked at grounding (one of them was not at one time) and the saw operators now turn the saws off when they go on break to allow the static electricity to settle down, and that seems to have helped some. Any experience out there with issues like this?