Microsoft is 'ramping down' production of its five-year-old Windows NT 4.0 operating system and will no longer sell volume licences for the product, the company said yesterday.
The system will still be available through retail outlets and Microsoft will continue to offer the Windows 2000 volume license, said a company spokesman,
Microsoft says users with an installed base of NT4 machines will be able to extend their licences by buying the Windows 2000 volume license and 'exercising downgrade rights' to keep using the older system.
Microsoft's spokesman could not confirm whether this would be more expensive than current licences, nor whether the license conditions would differ.
Support for the OS will continue, he said, and regular lifecycle guidelines will be issued to keep users up to date with developments.