Microsoft has officially unveiled Windows Server 2008 at a ceremony in Los Angeles, kicking off a series of 225 global launch events.

The platform is Microsoft's first server operating system since Windows Server 2003.
Initially known under its 'Longhorn' code-name, Server 2008 was scheduled for release in late 2007 but suffered delays and was not released to manufacturers until 5 February.

Microsoft touted several improvements in the operating system, including tighter security against memory-overflow attacks and a better system for recording and reporting errors.

"The overwhelming response from thousands of IT professionals and developers around the world is that Windows Server 2008 is the most secure enterprise platform we have ever delivered," said Microsoft chief executive Steve Ballmer.

Microsoft also released Visual Studio 2008 and SQL Server 2008 at the Los Angeles event.

A series of 225 'Heroes Happen Here' events designed to sell the new releases to IT professionals will be attended by more than 4,000 people, according to Microsoft.