Apple's legacy update servers for Intel Macs experience downtime.
How to Fix Boot Camp Error 40/4033 During Windows 10 Installation
Select your main hard drive (the top-level disk) and click First Aid . bootcamp 40 4033 windows 10 install
How to install Windows 10 on a Mac using Boot Camp Assistant YouTube• Jan 24, 2017
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Restart your Mac and immediately hold down to enter macOS Recovery Mode .
If you have already installed Windows 10 and need to install the 4.0.4033 drivers: Apple's legacy update servers for Intel Macs experience
Error 40-4033 is fundamentally a network or server communication issue. When you run Boot Camp Assistant, the utility attempts to connect directly to Apple’s servers to download the specific hardware drivers (graphics, audio, trackpad, and Wi-Fi) required for your Mac model to run Windows. Several underlying issues trigger this failure: