Batch File to Correctly Determine Operating System Version
SUMMARY: Inside a batch file determine if the operating system is Windows NT, Windows 2000, Windows XP, Windows Server 2003, Windows Vista, Windows Server 2008, or Windows 7.
Many DOS commands in the different versions of Windows are similar but may support different parameters. Plus, newer versions of Windows may support new commands or retire older ones. Thus, if you wish to write a batch file that can run on different types of machines, it may prove beneficial to determine the version of Windows on which the batch file is running. This way the batch file can execute commands appropriate to the operating system.
The following batch file will determine whether or not the machine is running Windows 7, Windows Server 2008, Windows Vista, Windows Server 2003, Windows XP, Windows 2000, or Windows NT. It can easily be modified to support other versions of Windows as necessary or to set an environment variable based on the version of Windows detected. Note that for this batch file to correctly discern between newer versions of Windows Server and consumer versions of Windows, it is more convoluted than batch files you may see elsewhere. I have explained the reasoning below.
1) Open a Notepad window.
2) Copy the following text into Notepad (you may want to access this tip's printed version as some lines wrap):
ver | find "2003" > nul
if %ERRORLEVEL% == 0 goto ver_2003
ver | find "XP" > nul
if %ERRORLEVEL% == 0 goto ver_xp
ver | find "2000" > nul
if %ERRORLEVEL% == 0 goto ver_2000
ver | find "NT" > nul
if %ERRORLEVEL% == 0 goto ver_nt
if not exist %SystemRoot%\system32\systeminfo.exe goto warnthenexit
systeminfo | find "OS Name" > %TEMP%\osname.txt
FOR /F "usebackq delims=: tokens=2" %%i IN (%TEMP%\osname.txt) DO set vers=%%i
echo %vers% | find "Windows 7" > nul
if %ERRORLEVEL% == 0 goto ver_7
echo %vers% | find "Windows Server 2008" > nul
if %ERRORLEVEL% == 0 goto ver_2008
echo %vers% | find "Windows Vista" > nul
if %ERRORLEVEL% == 0 goto ver_vista
:Run Windows 7 specific commands here.
echo Windows 7
:Run Windows Server 2008 specific commands here.
echo Windows Server 2008
:Run Windows Vista specific commands here.
echo Windows Vista
:Run Windows Server 2003 specific commands here.
echo Windows Server 2003
:Run Windows XP specific commands here.
echo Windows XP
:Run Windows 2000 specific commands here.
echo Windows 2000
:Run Windows NT specific commands here.
echo Windows NT
echo Machine undetermined.
3) Save the file as %WINDIR%\whichvers.bat
4) Now, from the command prompt, enter:
This will display which version of Windows you are running.
1. The reasoning for using the SYSTEMINFO command rather than relying on the VER command is because Windows Server 2008 "shares" version numbers with other Windows releases (see Microsoft). Thus relying on a "version number" of 6.0 to detect Windows Vista or 6.1 to detect Windows 7 fails to differentiate a machine from Windows Server 2008 or Windows Server 2008 R2.
2. The creation of %TEMP%\osname.txt is solely because I could not place the results of systeminfo | find "OS Name" directly into the for /f command - it does not like piped commands. You may find an easier way to handle grabbing the information from SYSTEMINFO - if so, please comment.
3. The environment variable %vers% has leading spaces. I could remove these with a longer batch file, but in this case it is not necessary.
4. The batch file detects for SYSTEMINFO as it assumes if it gets beyond the older operating system detections, the running version of Windows is even older and will not have this utility. On Windows 7 64-bit it is still located in the %SystemRoot%\system32 folder - if later versions of Windows become 64-bit only, this batch file may have to be updated.
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