I never had this problem but some have fixed it with changing compatibility mode Right click the client > properties > compatibility tab > then try any compatibility that works For others they have had to change their screen resolution.
There has been others with the same problem but I can't find the threads on my phone hopefully someone better than me can help you.
If you are using an intel cpu you could try disable your graphic card and see if that makes any difference, I guess running VMware might work, http://royals.ms/forum/threads/how-to-horntail-without-graphical-glitches-closing-your-client.16643/ if you are on Windows 8 I don't think that guide works and you will need to download VMware workstation. http://www.vmware.com/products/workstation/workstation-evaluation