1. Little originality, sometimes with a loss of elegance.
Everywhere you look, Microsoft has copied things that Apple has offered for quite some time in OS X. The User Account Control features, especially with the Vista Standard log-in, look a lot like Apple's user interface design. Too bad Microsoft doesn't let you lock and unlock things (leaving those settings permanent) the way Apple does. More than 15 years later, Microsoft is still following Apple in operating system design and bundled materials. With some notable exceptions (including IE7+, where it copied Mozilla, and the Windows Sidebar, where it bests Apple, Google and everyone in user-interface design), Microsoft is belaboring the point by reinventing the wheel, often with an overall reduction in productivity and usability.
I have no problem with Microsoft copying Apple's or any other company's best interface designs. We all win when that happens, and I wish Apple would steal the best things Microsoft does right back. What's really strange is when a company lifts good ideas and makes them worse, not better.