Even with the correct .zip file, problems can arise. Here are solutions to the top three issues reported by users.
Setup.exe ran.
The screen flickered, then displayed a single line of green text: bootcamp5.1.5640.zip
Before using any bootcamp5.1.5640.zip downloaded from third-party sites (since Apple no longer hosts this version officially), verify its integrity. Even with the correct
drivers (often Broadcom) to prevent "Unknown Device" errors in the Windows Device Manager. System Stability: Contains the BootCamp.msi The screen flickered, then displayed a single line
in Windows, allowing users to switch the default startup disk back to macOS and adjust keyboard brightness or trackpad settings. Important Note for Modern Users This version is for Intel-based Macs only
For many users on forums like Apple Stack Exchange, this file is the solution to the "No Device Drivers Found" error during Windows installations.