I saved my Seal Online clients in C: drive and also run it from the C: drive folder itself and sometime when it's still patching it shows this image.
I have also installed DirectX9.0 and when I check later after the installation finished it says I have DirectX11 so I assume DirectX11 supports DirectX10 and below. I already run it more than five times and the patching sometimes stop in different time, root10 or root27 or even root85. Anyone experienced at solving this problem?