pspx.msi /qn works with Admin install and the same serial number Install Corel_PaintShopPro1000_EN_PREMIUMCD_Retail.exe as normal entering your details and serial number, when complete goto C:\Program Files\Corel and copy the folder named Corel Paint Shop Pro X - Installation Files, to somewhere of your choice rename folder to what you want i called mine PSPX. then run the C:\PSPX\setup.exe /a to make admin install to folder of your choice mines was, D:\Corel_Paint_Shop_Pro_X then run D:\Corel_Paint_Shop_Pro_X\pspx.msi /qn