To determine if your Windows NT 3.x installation was updated with a service
pack:
- Type winver at the MS-DOS Command Prompt.
- Choose About Program Manager from the Program Manager Help menu.
- Check the version displayed at System Boot during the Kernel
Initialization Phase (when the screen turns blue).
- Start Registry Editor (REGEDT32.EXE). From the HKEY_LOCAL_MACHINE subtree,
view the following key:
\SOFTWARE\Microsoft\WindowsNT\CurrentVersion
WARNING: Using Registry Editor incorrectly can cause serious, system-
wide problems that may require you to reinstall Windows NT to correct
them. Microsoft cannot guarantee that any problems resulting from the
use of Registry Editor can be solved. Use this tool at your own risk.
The value under Windows NT 3.5 and 3.51 is:
CSDVersion:REG_SZ:Service Pack x
The value under Windows NT Advanced Server 3.1 is:
CSDVersion:REG_DWORD:0x300
To determine which service pack is installed in Windows NT 4.0, use one of
the following methods:
Method 1
During the startup process, Windows NT displays a blue screen with
information at the top. This information includes the version of Windows NT
being booted, as well as the build number for that version. It also
provides the service pack number if any has been installed.
Method 2
From the Windows NT desktop, click
Start, and then click
Run. Type
winver
in the
Open box and click
OK. An
About box appears, which lists what build
number of Windows NT you are running as well as the service pack version number.
NOTE: This same dialog box can be reached by clicking the
Help menu and
then click
About in Windows Explorer.
To determine version information in Windows 2000:
From the Windows 2000 desktop, click
Start, and then click
Run. Type
winver
in the
Open box and click
OK. An
About box appears, which lists what build
number of Windows 2000 you are running as well as the service pack version number.
NOTE: This same dialog box can be reached by clicking the
Help menu and
then click
About in Windows Explorer.