gacutil is not recognized as an internal or external command, operable program or batch file

Sometimes, you want to run gacutil from the command line:

gacutil /i {assemblyPath}

On some computers (depending on the installation), you might get the following error message:

'gacutil' is not recognized as an internal or external command, operable program or batch file

You'll need to download and install the Visual Studio 2005 SDK. Included in the SDK is gacutil.exe. In order for Windows to recognise the gacutil command, you'll also need to modify the Path variable (Environment Varabiables). Simply add the location of the executable which is normally:

C:\Program Files\Microsoft Visual Studio 8\SDK\v2.0\Bin

Remember to include a semi-colon before adding the folder location.