You get an alert that Apple Software Update has stopped working.You have issues with Bluetooth or Wi-Fi in Windows.You can't adjust the brightness of your built-in display in Windows.
When you install Microsoft Windows on your Mac, Boot Camp Assistant automatically opens the Boot Camp installer, which installs the latest Windows support software (drivers). If that doesn't happen, or you experience any of the following issues while using Windows on your Mac, follow the steps in this article. Boot Camp requires a Mac with an Intel processor.