A new Windows 7 build has leaked to the internet, turning recent appearances of pirated copies into a weekly event on file-sharing sites.

As many as 10 different copies of Windows 7 Build 7068 have been added to BitTorrent since last Friday, according to searches on popular tracking sites such as Mininova.org and Pirate Bay. Illegal copies of both 32- and 64-bit editions are available.

The appearance of Windows 7 Build 7068 follows the leak of Windows 7 Build 7057 by about a week; 7057, in turn, followed 7048 by about the same time span. The newest build is the fourth to hit BitTorrent since Microsoft stopped offering the Windows 7 public beta last month.

Traffic on this build has been especially brisk. As of yesterday, Mininova reported that the various copies of Windows 7 Build 7068 have been downloaded a combined total of more than 65,000 times.

windows 7 bittoreent

Although Build 7068 was compiled by Microsoft on March 21, there's no hint in the new version that it is a possible release candidate (RC), unlike earlier this month when some downloaders speculated that Build 7057 was the long-awaited RC.

Last week, in fact, Microsoft accidentally revealed details of Windows 7 RC, including a May 2009 delivery of a public download and a new expiration date, June 1, 2010, for the preview.

According to the My Digital Life site, Windows 7 Build 7068 expires on March 2, 2010, the same date as earlier builds, including 7057, displayed.