Please check to make sure that Disable Windows Aero is not checked you should find this under Coherence. (under Virtual Machine then Configure)
Also please check to see if you have the latest version of Parallels 7.
How much Video memory do you have? You can use up to 1 GB of video memory. If you are
making the change while the vm is on please re-start the vm and then mack the changes in
Performance Information Tools from the Control Panel.
Last edited: Jan 20, 2013