You have to give us time. Uninstall Maya, delete the preferences folder, delete the Autodesk folder in your program files, then reinstall. If it pops up asking if you'd like to copy preferences over from an older version of Maya, click no. This causes problems. I have uninstalled Maya 2010 64bits, and i have deleted all preferences and folders. I installed the 2011 edition, but the problem is related to views, when i try to change from perspective to 4 views it shows some views and hides others.(no prblem with pref now)