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#1
Yes, I found a solution. But you will need to reinstall all of your programs after this. Your files will be kept so don't worry.
1) Download the .iso file from Download Windows 10 Technical Preview ISO - Microsoft Windows
2) Extract it and run setup.
3) Choose Keep files and stuff. (the second option, don't keep Windows settings)
4) Install.
5) Done.
I did the upgrade to 10 from Windows 7 on July 30. None of the Metro apps would open except Cortana. I found that if I restarted and opened an app first, then it would open but the second one I tried to open would not. If I opened another program like Chrome of Word, they would open just fine but not the other app like Edge. Going to task manager showed that the app was indeed running it just was not showing. My solution after two hours of restarting the computer was rolling back to Windows 7. Does anybody have a better solution than MonkeyDoc? I really don't want to reinstall all my programs.