I have been a user of ACT! since the first version and because users are stitched up with their data format users have to stick with the thing through all the upgrades. Each upgrade just makes it worse and now these are linked up to the latest version of Windows - this means that a copy that worked with Vista will not work with Windows 7 or vice versa. The software has a number of fundamental flaws; the first and most irritating is that it will not run reliably at a screen resolution greater than 1024 x 768. It also has hysterics if you run more than one monitor. It requests re-registration at irregular intervals which will eventually exceed the number of permitted registrations so users have to plead with them to reset the counter. I have had so much trouble with this that Sage Support now refuse to answer requests for help. I am stuck with this because I have data in the program which I cannot get at any other way, and it cannot be exported in any format that another similar product can import and work with. I have wasted so much money and time on this piece of rubbish I feel I should make sure as many as possible know about it.