Core77

Microsoft Next Generation PC Design Competition is open to amateur, student and professional industrial designers who are 14 years or older at the time of entry, however residents of the following countries are ineligible to participate: Cuba, Iran, Libya, North Korea, Sudan and Syria.

Students do not need to be enrolled in an industrial design program to participate and student entries can be submitted in any category, even if the design is in research or corporately funded.

Designs for practically any Windows-based PC design concept may be entered; however challenges of manufacturability should be considered.

Deadline is December 18, 2006.

Oh and I don't think you can use a Mac to design it!

Via Dexigner. Full details on competition website.