Soft licenses are linked to the specific hardware of the computer on which they are activated. In most cases, the hardware configuration is fairly unlikely to change significantly and so it is a good way to make sure that the license is running on the computer it was activated on to limit unlicensed copying of the license. This article on activating licenses also covers how to transfer the license to another machine. So if you need to transfer your license to a new computer please follow the instructions there. However, it is also possible to activate a software license on a Virtual Machine. But VMs can be copied and transferred to another computer very easily, which is part of their appeal, but so could licenses attached to that machine, which is not allowed by the terms of the license agreement. Therefore, the licensing system has been designed to detect changes to virtual machines that could indicate the VM has been duplicated. If such changes are detected the license will be disabled and it is not possible to restore the license from that point. Please check this article for choosing license configurations if you intend to use Vision4D on virtual machines. If your license has been disabled that way, please log a support ticket using the link at the top of this page and a member of the support team will contact you to discuss options.