Microsoft officials have said that they will include a tutorial to get users comfortable with the Start screen -- and presumably, the omission of the Start button -- but whatever Microsoft has planned isn't in the Release Preview.

Can I play DVDs on my PC if I install Windows 8? Yes.

Although the Windows Media Center will be a for-a-fee add-on to Windows 8 Pro -- Microsoft hasn't said how much -- the company's giving it away during the Release Preview period.

To install it, head to "Add features to Windows 8" and enter this product key:

MBFBV-W3DP2-2MVKN-PJCQD-KKTF7