Microsoft to Release Windows 8 Developer Preview Today

According to the official "Building Windows 8" blog, Microsoft will be releasing a developer preview of Windows 8 "later tonight". The OS preview will be available in both 32-bit (x86) and 64-bit (x64) builds, bundled with dev tools and a demo application suite. Upgrading from Windows 7 unfortunately isn't supported, so you'll have to do a clean install. The blog stresses that this is only a developer preview, rather than a beta release.

You probably want to try out the preview release—and you can. Starting later tonight you can download the Windows 8 Developer Preview. This includes a 64-bit (x64) build with development tools to build apps, and a 32-bit (x86) or 64-bit (x64) build without development tools. The releases also include a suite of sample applications (please note these are merely illustrations of potential apps, not apps that we intend to ship with Windows 8). The ISOs are linked to from http://dev.windows.com.

[Building Windows 8]