: Open the zip file and extract the contents to a temporary folder. You should see a file named L.A.Noire_Patch_v1_3_2617.exe or similar. Locate Game Directory : Most installations are located at: C:\Program Files (x86)\ Rockstar Games \L.A. Noire Apply the Patch Copy the patch executable into the root directory where LaNoire.exe is located. Right-click the patch and select "Run as Administrator" Security Software : If the patch fails to launch, temporarily disable Windows Defender

If you are looking for what this specific version (v1.3.2617.0) actually changed in the game, the official Rockstar Games updates typically included:

This update generally addresses stability on modern systems and fixes the dreaded "Missing EXE" error for cracked versions.