Microsoft Corp. officially released the first beta for the long- and eagerly-awaited Windows operating system update (formerly codenamed Longhorn).

The Redmond, WA-based software giant has released technology builds before, but this is the first true beta release. The company expects beta testers to pound on it until it releases Beta 2 early next year.

There will likely be a number of other interim releases during this time, with the expected final launch of the new operating system to happen in late 2006.

Beta 1 offers testers a detailed look at the new interface, security features, and Internet Explorer 7. There are numerous under-the-hood enhancements as well. Both the operating system and browser, for example, will offer integrated RSS support.

Learn more about the beta in PCMag.com special report: Hands On with Windows Vista Beta 1.

More on Windows Vista: • Windows Vista's New Look • The Windows Vista Glossary • Windows Security • Performance & Reliability • Internet Explorer 7 • What Might Have Been • Get a Visual Tour of Vista

Copyright © 2005 Ziff Davis Media Inc. All Rights Reserved. Originally appearing in PC Magazine.