1) You'd have to reinstall to change which partition Windows is loaded to. You put it on the recovery drive, which is a small partition designed to have an image or files that you can restore the OS from. You should reinstall to the larger partition.
2) Make sure you download and install the correct drivers for your video card. Then, go to "Performance Information and Tools" in the control panel and run the system assessment. This should enable Aero automatically if it passes the tests.
3) Go to User Accounts in the Control Panel and click "change your password" to put one on your account.
http://www.sevenforums.com/tutorials...e-disable.html for the Hibernate thing.