Microsoft Corp. said Thursday that it has released a number of 64-bit operating systems to manufacturing, including Windows XP Professional, in time for a scheduled release in late April. Specifically, Microsoft said that Microsoft Windows Server 2003 Standard x64 Edition, Microsoft Windows Server 2003 Enterprise x64 Edition, Microsoft Windows Server 2003 Datacenter x64 Edition, and Windows XP Professional x64 Edition all had been released to manufacturing. Further details will be released at the Windows Hardware Engineering Conference (WinHEC) later this month.