A legitimate Boot Camp driver package comes as a folder containing .inf , .sys , and .dll files, or a .exe that digitally signed by Apple Inc.
Method 2: Apple Software Update (If Windows is already installed)
: If you require a standalone installer, you can search for "Boot Camp Support Software" on the Apple Support Downloads page
Navigate to BootCamp > Drivers > Apple and locate the BootCamp.msi file. Right-click and select "Run as Administrator."