The second Windows 10 Technical Preview is available…open the Charms bar by hitting Windows + C on your current preview build . Click on Settings , Change PC Settings, Update and Recovery, Preview Builds and Download Now
Do NOT install this on a production computer. As you can see above, we installed this on a VM to test the Technical Preview. You should always select slow on upgrading your previews. Windows 10 Technical Preview so far has been excellent!
Don’t forget to clean up!