Hi Gianni,
Take this with a very large grain of salt, I probably have no idea whatsoever what I'm talking about!
I have actually thought that this error is produced as a result of operating system problems, not specifically Amazing Charts problems. As I think back (and this goes back to the Windows XP era) I remember a few occasions where a single PC would have this error more frequently, as well as other "funny behavior" not related to Amazing Charts. I reinstalled the operating system, and things went back to normal.
Of course, in the process of reinstalling the operating system, I also reinstalled amazing charts.
Gene