Running Photoshop CC 2017. Latest update.
Open a New document - US Paper, default settings.
No matter what I do, the color picker palette will NOT appear, either in this new document, or in old documents where the palette formerly worked just fine. Using the "X" shortcut key, I can switch colors from black to white, but the foreground/background color icon does not switch in the toolbox. I've restarted Photoshop multiple times whilst holding down control-alt to try to reset Preferences to default. No joy. Gone thru all my preferences... nada.
Found a reset option... but problem appeared again yesterday. Reset again - problem appeared AGAIN. HELP!! It's defaulting to the "Show Sampling Ring" - which I hate - too. I cannot get the color palette to appear. WTF?