My wife's computer has Vista o/s and when she plays (Carnival Critters) which is a slot machine game and has wheel and rather than turn smooth, the wheels turn slow and herky-jerky. My computer employs windows 7 o/s and a week or so ago, I was experiencing the same problem. I posed the same question on this forum and someone directed me to the Advance tab on Internet Properties and then under Accelerated Graphics to see if the box is checked for "software rendering instead of GPU rendering" and if it is to uncheck it. The reason is that if you are running IE9 it will employ usage of that and the box will be checked. My computer uses IE11 so I unchecked the box and I am getting a good performance of the game. We tried it on my wife's computer and she is using IE9, and the box would not uncheck. So that's where we are. Thank You for any help.