Did you do it this way?
Inside of Photoshop click and hold the left mouse button, move the eyedropper to the wanted color and release the mouse button.
I just try it and it didn't work On the side note: I got my "Show Sampling Ring" to work.
Next try - reset all the preferences:
Start Photoshop and immediately press and hold Alt+Ctrl+Shift until a message box comes up which you confirm.
If you don't see the message box you were too slow.
What do I do with the message box?...I just bought cs6 so all the preference are in default already.
What do I do with the message box?...
I just bought cs6 ...
But not from Adobe ... are you sure it's a legal version?
... so all the preference are in default already.
Oh no, not always and not necessarily.
You don't know Photoshop. It likes to be a diva sometimes.
There wasn't any option for yes, so I pressed ok. However, it seem not to work. And yes it is a legal version, I checked with adobe support about it.
Bumping does not produce any new knowledge.
I can pick up any outside colors without trouble. (PS CS6, Win 10, NVIDIA GeForce GT 730)
The last thing I can think of is the graphics card driver or settings because this is more often the source of issues. But since you can see the sampling ring, everything seems to be OK.
You can check and/or change the settings of the GPU in Edit > Preferences > Performance > Advanced.
And you can check the System Informations (Help menu). Is Open GL enabled? Is Open CL available?