Ged, what you´re seeing in your system is probably coincidence. On my WIN 10 Pro system with 32GB RAM, PS always shows about 25 GB available RAM, no matter, how many processes and other programs are running. Even it the taskmanager shows only 16GB "available RAM", PS still shows the same 25GB. Besides that, PS always showed about 28GB instead of 25GB available RAM in older versions. So someone from Adobe has to explain that difference.
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