[updated] — Boot Camp Support Software 5.1.5621

Boot Camp Support Software 5.1.5621 a critical driver package for users running versions of Windows 7, 8, or 8.1 on older Intel-based Macs

In the Broadcom 802.11ac driver properties, disable “Roaming Aggressiveness” and set “Preferred Band” to 2.4GHz or 5GHz explicitly. boot camp support software 5.1.5621