"Inside _GetOSDetails. Failed to find IsWow64Process2"
This appears a myriad of times in the install log after I attempt an install.
Trying to install looks like it's going well, int initial install works, but when the creative cloud window opens and the icon appears in the system tray the window is just blank and after about a minute the window and the system tray icon just disappear, no error message or prompt of any sort.
I can't really find much on iswow64process2 other than it's basically to tell what bit verion your pc/os is.
Hmm, Windows 10 introduced IsWow64Process2 in version 1511, so you should have it. However, 1703 is very old (about 4 years). Because Windows 10 updates automatically, app developers expect you to just be up to date, different from older versions of Windows. And indeed, you don't meet the system requirements "Windows 10 (64-bit) version 1809 or later; LTSC versions are not supported". [LTSC is a kind of Windows which is supported for a long time, and unchanged. It is designed for nuclear reactors and medical equipment, the sort of thing you would not expect to find Photoshop on. Unfortunately some companies made the mistake of deploying it to ordinary users who want to be able to run apps on it].