Computer requirements

I recently set up a Windows 7 desktop to run my longmill. Once I sorted out the comm port I got it running and it all works. But, there is an annoying lag when jogging the machine. The computer is pretty old but it has plenty of drive space, 3 Gb Ram, and a 1.66 Ghz core 2 quad processor. Should this processor be adequate? What else could be the cause of the lag? Thanks

Have you tried having task manager open so you can see cpu and ram usage while running the LongMill? It might provide some insight into what the problem is.

I have, and it looks like the processor is pinned.

Are you familiar with the Linux operating system? There are some lightweight distributions that don’t take as many system resources as Windows. It might be worth a try.