Many thanks for your replies. At the moment I have three computers. Two are running Windows 10 and one with Windows 11. I am not having any problems running any programs on the Windows 10 machines. It is when I want to use Poser Pro 11 or 12 on my Windows 11 computer I am having problems. I tried to install a copy of Windows Pro 2014 on the 11 machine and it will not open. However, I have the runtime connected. But the files mentioned above will not work! Cheers

Custom built computer 128 gigs RAM,2 Terrabyte hard drive, NVIDIA RTX 3060 12 Gig, Intel i9, Dual Dell Screens, 0/S Windows 11, networked to a Special 12th Generation intel I9, RTX 3060 12 Gig, Windows 11,64 gigs RAM, Dual Phillips Screens, 2 Terrabyte SSD Hard Drive plus 1 Terrabyte Hard Drive,3rd Computer intel i7,64 gigs ram, Graphics Card NVIDIA GeForce GeForce 1660 Ti 6 Gig,1 Terrabyte Hard Drive, OS Windows 10 64 Bit Dual Samsung Syncmaster 226bw Screens.Plus Lenovo Laptop 64 Bit,12 gigs Ram.Intel i7 chip.Windows 10 Pro and Ultimate. 4 x 2 Terrabyte Hard Drives and 2 x 2 Terrabyte external USB Hard drives. All Posers from 4 to Poser 2010 and 2012, 2014. Poser 11 and 12, 13, Hexagon 2.5 64 Bit, Carrara 8.5 Pro 64 bit, Adobe Photoshop CS4 Creative Production Suite. Adobe Photoshop CC 2024, Vue 10 and 10.5 Infinite Vue 11 14.5 Infinite plus Vue 15 and 16 Infinite, Vue 2023 and 2024, Plant Catologue, DAZ Studio 4.22, iClone 7 with 3DXchange and Character Creator 3, Nikon D3 Camera with several lenses.  Nikon Z 6 ii and Z5. 180-600mm lens, 24-70 mm lens with adapter.Just added 2x 2 Terrabyte portable hard drives.