Hi, Some antivirus programs recognize Princess Maker 5 program as a virus, preventing its normal installation and program to start up. We have now solved the problems with major antivirus tools [b] as below.[/b] - V3 - [b] Alyac[/b] - BITDEFENDER - F-secure - Microsoft security essentials [b] [/b] - Avast free Antivirus Please let us know the information on your antivirus tool if you still have similar problems, and we will take action accordingly. Thank you.