Microsoft's telephone support for the 7-year-old operating system ceases at the end of June. Customers' only option will be to go online to work out problems themselves. Until now, the Redmond, Wash., software maker has kept up its paid telephone, or "extended," support and has developed any needed security patches for the operating system.
Those with the server version of NT 4.0 have a bit more time. As earlier reported, extended support for that operating system. Extended support consists of paid support and continued security patches known as "hot fixes."
Microsoft hadto end support for NT 4 Server some time this year, but in January, said it would extend the deadline. At the time, the company said more than a quarter of server customers were still running the OS, which made its debut in 1996.
The software maker isoperating system, released earlier this year.
Meanwhile, Microsoft on Thursdayan improved version of its Windows 2000 software, including security fixes as well as support for USB 2.0 and wireless Internet connections.
Another deadline looms for desktop customers running Windows 98. Extended support for that product ends January 15.
With its newer operating systems--Windows 2000 Professional and Windows XP--Microsoft has announced. Under the new guidelines for system software released after October 2002, the company will offer mainstream support for five years after the OS is made generally available, with extended support running a further two years.
Microsoft has a timeline for operating system support on its Web site.