It was clear that a release of Windows 7 would sooner or later make its way into the dark side of the Internet. Windows 7 Milestone 1 with the buld number 6519 was released on June 11th by a group calling themselves The Microsoft Beta Project. The nfo file, a sort of readme text file states that the downloads has a packed size of 3.1 Gigabytes and that it will fit on one DVD after uninstallation.
The group created a crack to defeat the WGA protection of the Windows 7 build. Microsoft is apparently shipping the Windows 7 test builds with WGA protection, probably to reduce the chance that a leaked release will be useful to downloaders. The crack uses a combination of file replacements, modifications and the bios time to fake the validation.
The reminder written by the group seems to contain an error. It states:
This build will expire in June 2008!
So you have 6 months to test!
What they probably meant to say was that this release will be valid for six additional months from June 2008 on. Interestingly though the BIOS clock will be set to December 2007 which is six months as well.