For safety and security, it is always recommended to download drivers directly from Apple. The file is usually hosted as a .zip archive.
If you already have Boot Camp installed and just need to reinstall drivers, download the BootCamp6.1.6655.zip from a (like the Boot Camp Driver Repository on GitHub or TechPowerUp), then extract and run setup.exe in Windows. Always scan with Windows Defender first. boot camp support software 6.1.6655 download