Hi. For users who using Microsoft Windows Defender, Due to "Princess Maker 5" is recognized as a virus, it could not be normally installed and started. For solution, please follow below the way which is through Microsoft helping us to save it. First, please update the definition file of Microsoft Windows Defender, https://www.microsoft.com/en-us/wdsi/definitions Second, please reinstall "Princess Maker 5". If you have any other problem about Anti-virus, such as having trouble in installing or starting up.etc , please feel free to contact with us. Please send us the details of the problems, we will find out the solution to help you to take action. Thank you.