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When you log off a computer (and you are not logged on as an administrator), the state of the NumLock key on your keyboard is not saved.
To resolve this problem, obtain the latest service pack for Windows NT 4.0 or the individual software update. For information on obtaining the latest service pack, please go to:
152734 how to obtain the latest windows nt 4.0 service pack
For information on obtaining the individual software update, contact Microsoft Product Support Services. For a complete list of Microsoft Product Support Services phone numbers and information on support costs, please go to the following address on the World Wide Web:
Microsoft has confirmed that this is a problem in the Microsoft products that are listed at the beginning of this article.
This behavior is by design in Windows NT 4.0 Terminal Server Edition, Windows 2000 Server, and Windows 2000 Advanced Server running Terminal Services.
This problem was originally addressed in Microsoft Windows NT 3.5, but resurfaced in Windows NT 4.0. For additional information, click the article number below to view the article in the Microsoft Knowledge Base:
123498 NumLock Key State Not Saved When Logging Off
217884 NUMLOCK Setting Reset After Logging off Terminal Server