Spot healing brush tool no longer works correctly

[dukeeastwood]

for about a week now anytime I try the spot healing brush tool it no longer works like it used to... no matter what I try (changing the hardness, changing the layer I'm sampling from, changing the size of the brush) nothing helps now that the tool isn't working. What I'm seeing is ring around every retouch that is obvious and not seamless like the tool used to do. Imagine one retouch that looks wrong now being in place of every single retouch you try, even ones that used to be , and should be, seamless... but no... you get a big, ugly,  discolored line around the outside of the brush click....

nothing like being on a time crunch and then finding that the Adobe product you depend on just isn't working properly anymore.

[Gerry Allen]

Finally, I've found a solution to this issue. Has only happened recently, possibly after my graphics card updated itself.
Thanks for the solution
Cheers