With Photoshop CC 2014 Adobe introduced the stupidest “feature” Adobe has ever introduced. (And that’s saying something!)
From now on Photoshop uses Microsoft’s Windows Ink API, which simply doesn’t work. There are odd circles appearing around your cursor, right click doesn’t work reliable and pressing alt (to pick a color for example) takes ages to temporary switch the tool. Luckily it is possible to disable this Windows Ink thing.