Here are some tips and troubleshooting steps to keep in mind:
Windows 10 will assign a generic driver, but it will disconnect on sleep. macbookpro9 2 windows 10 drivers
Have a different issue? Check the exact hardware ID in Device Manager (VEN_14E4&DEV_4331 for WiFi) and search the BootCamp subreddit for specific INF tweaks. Here are some tips and troubleshooting steps to