6. It'll put a crimp in your entertainment options
Installing the Windows 10 Technical Preview disables the PC's ability to play DVDs using Windows Media Player, and it removes Windows Media Center from PCs running Windows 8 Pro with Media Center. It's not clear why this is. Maybe Microsoft wants you focused on the testing, and not spending time watching movies or listening to music.
7. The Tech Preview is currently available in only three languages, and the implications of that go beyond linguistics
Currently, the OS comes in English, Chinese Simplified and Brazilian Portuguese. People moving from Windows 7, 8 and 8.1 in those languages will be able to keep their Windows settings, personal files and "most" apps. If the Windows 7, 8 and 8.1 OS interface is in any other language, they'll only be able to keep their personal files when upgrading, and they will have to reconfigure the settings and reinstall their apps.
And if you're moving from Windows Vista? You're fried. "You must boot from media and perform a clean install," the FAQ says.
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