6. Flip3D: Press Windows-Tab, and you get Vista's fancy 3D task switcher, which pointlessly requires you to cycle through tasks one by one. This duplicates the functionality of Alt-Tab instead of enabling you to get to any task in a couple of clicks, as Apple's similar Exposé does.
7. Backup: Win 7's Backup and Restore Center no longer requires you to devote an external hard drive to a full system backup. But it still isn't as easy to use as Apple's Time Machine. And Microsoft's decision to put network backup only in Windows 7's priciest editions is just silly.
8. Versionitis: Having multiple versions of Windows is fine in theory. But in reality, their minor, subtle, and arbitrary differences invite confusion. Misleading names like Windows 7 Home Premium don't help.
9. Internet Explorer 8: Windows 7's bundled browser is perfectly adequate. But it's playing catch-up with innovative competitors such as Firefox and Google's Chrome, not setting new standards.
10. Document viewing: Like Vista, Windows 7 lets you create application-independent documents that use Microsoft's PDF-like XPS format to retain their original formatting. But PDF is pervasive and XPS hasn't caught on, so wouldn't it be infinitely more convenient if Windows 7 supported PDF out of the box?