A. Several Windows NT installation types exist, such as NT Workstation; NT Server; NT domain controllers; NT Server 4.0, Terminal Server Edition (WTS); and NT Enterprise Edition. To check the installation version, type

net accounts

However, this command sometimes won’t give all the information. Another way to check your version is to look in the registry. To do so, complete the following steps:
  1. Start the registry editor (regedt32.exe).
  2. Move to HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ProductOptions.
  3. Look at ProductType, it will be one of the following types:
    WinNT - Windows NT Workstation
    ServerNT - Windows NT Server standalone
    LanmanNT - Windows NT Server Domain Controller
  4. You can also look at ProductSuite (if it exists), and depending on your version, you might see one of the following types:
    Terminal Server - WTS
    Enterprise - Enterprise Edition
  5. Close the registry editor.

If you attempt to open or edit these values (depending on your service pack), the OS gives you a warning and changes the value back to its original setting. Don't try to change these values.

If you don't want to search the registry, WinInfo (from http://www.savilltech.com/download/wininfo.zip) displays the product type (and much more), which will be one of the following versions:

  • NT Workstation
  • NT Server
  • NT Domain Controller
  • WTS
  • NT Enterprise Edition