DVD drive not found (this happens despite the drive being visible in the BIOS and the standard driver is working): 8 percent
Hidden extensions (Windows Explorers default setting in all the versions of Windows is to hide file extensions, as well as system files and folders): 6 percent
Too many minidumps (By default Windows 7 keeps the last 50; minidumps are the memory images saved on the system when your PC crashes): 6 percent
Aero snap problems (Windows 7 has a handy new ability to move and resize windows, all in one movement, but sometimes it does not work as expected and can become annoying): 3 percent
Phone wont sync with Windows 7 (usually with the 64-bit edition, the iPhone sometimes get recognized but then iTunes returns with the error 0xE8000065): 2 percent
Custom icons get changed with new theme (When a new Windows 7 theme is applied, custom icons can be lost): 2 percent
Taskbar problems (In Windows 7, its difficult to tell at a glance whether an icon is a running application or a pinned shortcut): 1 percent
