Here are some things that helped me.
Download CCleaner This program has been around a long time. It is well known and completely safe.Download it and run it before you open your browser to play.
http://download.cnet.com/CCleaner/?tag=main;pop
Go to www.adobe.com and make sure you have the latest version of flash player.
Go to http://www.wgt.com/forums/t/167923.aspx and run the flash test on all the browsers you have on you computer and use the one that scores the highest when you play. With Google Chrome my score was off the charts. Mozilla Firefox came in 2nd. Your mileage my vary.