Redistributable Libraries for Intel® C++ and Fortran 2020 Compilers for Windows*

By Ronald W Green,

Published:12/05/2019   Last Updated:07/16/2020


This article contains links to the redistributable installation packages for Intel® C++ and Fortran Compilers for Windows*.

If you are looking for other versions, please go to Redistributable Libraries by Version.

The redistributable packages are for the end users who use applications that are built with Intel Compilers. Please note that there is one redistributable package for every compiler update. Make sure you download and install the one recommended by the application vendor.

OS requirement for redistributable packages

Please read the Release Notes of the update for supported OS distributions:

Installation instructions

The installation program of the redistributable package will guide you through the installation. You will need to accept the EULA and the installation will install all the libraries to the fixed directory: [Common Files]\Intel\Shared Libraries\

The installation creates a new env-var "INTEL_DEV_REDIST" with the value of above installation directory, and the PATH env-var is updated with [INTEL_DEV_REDIST]\redist\[ia32|intel64]\compiler and [INTEL_DEV_REDIST]\redist\[ia32|intel64]\mpirt (for Fortran packages). The "redist\intel64" directory is added only on 64-bit systems. See below for more information on PATH changes.

Additionally on 64-bit systems there is another subfolder  [INTEL_DEV_REDIST]\compiler\lib\mic with redistributable libraries for Intel® Many Integrated Core Architecture(Intel MIC) architecture. And an environment variable MIC_LD_LIBRARY_PATH is set to this location.

If you wish to install the redistributable package "silently", so that no output is presented to the user, run the executable with the following options added to the command line like:

>> ww_icl_redist_msi_2020.2.254.msi /quiet /qn
>> ww_ifort_redist_msi_2020.2.254.msi /quiet /qn

System PATH Environment Variable Changes

Installation of the redistributable libraries, in either MSI or MSM form, adds folders containing the installed DLLs to the system PATH environment variable. Microsoft Windows has a limit on the total size of the value of PATH; in versions later than Windows 7 the limit is 4095 characters. This limit applies not only to the system-wide definition, but the length as modified by any batch files or scripts run. If the length is exceeded, the value of PATH can be truncated and this can cause WIndows or some applications to operate improperly.

If you are concerned that PATH may get truncated, you can prevent the redistributable installer from modifying PATH, but then it is your responsibility to make sure that the proper folders are named in PATH when programs built using the Intel compilers are executed.

If you are using the MSI installer, use the command line and add the parameter NO_UPDATE_PATH=yes.For example:

msiexec /I  ww_icl_redist_msi_2020.2.254.msi NO_UPDATE_PATH=yes

msiexec /I  ww_ifort_redist_msi_2020.2.254.msi NO_UPDATE_PATH=yes

If you are using the MSM merge module, set the update property NO_UPDATE_PATH=yes in the installer properties.

Testing your Installation:

After installation of the Intel redistributable libraries AND the prerequisite Microsoft Visual C++ redistributables or Visual Studio with C++ tools and libraries, try to run your Intel-compiled binary. If there are any issues, please try to determine the missing DLLs or libraries using a tool such as Dependency Walker.

Links to the redistributable packages

Intel® C++ Compiler 19.1 for Windows* Intel® Fortran Compiler 19.1 for Windows*
Initial Release
Redistributable library package
Initial Release
Redistributable library package


Have Questions?

Please consult the Intel User Forums:

Product and Performance Information


Intel's compilers may or may not optimize to the same degree for non-Intel microprocessors for optimizations that are not unique to Intel microprocessors. These optimizations include SSE2, SSE3, and SSSE3 instruction sets and other optimizations. Intel does not guarantee the availability, functionality, or effectiveness of any optimization on microprocessors not manufactured by Intel. Microprocessor-dependent optimizations in this product are intended for use with Intel microprocessors. Certain optimizations not specific to Intel microarchitecture are reserved for Intel microprocessors. Please refer to the applicable product User and Reference Guides for more information regarding the specific instruction sets covered by this notice.

Notice revision #20110804