Thank you for your feedback. To run iClone 7 on Windows 7 SP1, you need to update Windows hotfix KB2670838 for DirectX compatibility. Please make sure you have installed this hotfix, and try with the latest version iClone v7.2. https://support.microsoft.com/en-us/help/2670838/platform-update-for-windows-7-sp1-and-windows-server-2008-r2-sp1 If you have installed Windows KB2670838 hotfix, and iClone v7.2 still crash. Please provide us the iClone startup log and crash dump files for further checking. Download the zip file with the link below, inside the zip you can find the description about how to generate the startup log and crash dump. https://goo.gl/uVs6WN You can use cloud services such as Google Drive, Dropbox or OneDrive to make the files available to us and email the link with "FT3762" in the email title to feedbacktrackeradmin@reallusion.com. Reallusion