Chronos is a piece of time synchronization software you need to be aware of. It does actually do a good job of time synchronization. But when you download the free version you get a popup every few hours to upgrade to Pro version at AresGalaxyOnline.com. Out of frustration I finally did spend the money and upgraded. But I am still getting the popup and boy am I boiling. After three attempts to contact support, I have receive no answer. So they virtually have no support and the only way it seems I am going to get rid of the popup is to uninstall the program. And after paying for the program that is a very unsatisfactory solution to the problem. So beware of this piece of software. Buy at your own risk!