Windows NT 4.0喺Windows 2000推出之後，微軟已經終止所有關於NT 4嘅服務，然而到2007年為止，即管微軟希望他們嘅客戶可以換成新版本，依然有好多公司配合舊硬體持續穩定運作而繼續用呢個系統。
Windows NT 4.0 After the introduction of Windows 2000, Microsoft has discontinued all NT 4 services, but as of 2007, although Microsoft wants their customers to be able to switch to the new version, there are still many companies that continue to use the system with the continued stable operation of the old hardware.