How to fix extremely slow WiFi in W10 Bootcamp
Environment:
Apple MacBook Pro late 2016, Catalina with the latest updates as of 10/17/2019
Windows 10 Pro 1903
Problem: Windows replaced apple driver with the Microsoft driver which degraded wifi performance.
To fix:
1. Download boot-camp drivers using standard apple process ( Start boot-camp assist and select action "download windows files").
2. Boot to Windows, extract files from BroadcomWirelessWin8x64.exe
- In Device Manager delete wifi 802.11ac device.
4. In system32\drivers\ replace BCMWL63A.SYS with bcmwl63a.sys which was extracted from apple BroadcomWirelessWin8x64.exe file.
- In Device Manager rescan the devices