If you are looking for a "download" because your current file is crashing, it is safer to repair your existing installation rather than downloading a random .exe from the web, which could be malware. How Do I Repair Iw4sp.exe Errors? - Solvusoft
While this article discusses modifications and downloads, to use iw4sp.exe or any derived files. Downloading copyrighted executable files from piracy sites is illegal and violates Reddit, Google, and Bing policies. Iw4sp.exe Download
First, let’s break down the name. stands for Infinity Ward (the developer), 4 refers to the fourth generation of the IW engine (used for MW2), and SP stands for Single Player . If you are looking for a "download" because
: Some crashes are caused by features like "Ambient Occlusion." You can disable this specifically for the game in the Nvidia Control Panel under Manage 3D Settings . : Some crashes are caused by features like