If all else fails, the hardware itself is the bottleneck. A $20 Intel Wi-Fi card replacement is a permanent cure, saving you from driver headaches forever.
If you still face issues (blue screens, adapter vanishing), consider spending to replace the BCM43142A0 with an Intel 7265 or 8265 Wi-Fi card. Those have native Windows 10 64-bit drivers and perform 5x better. However, if you want to keep the original hardware, the method above will give you a stable connection. Bcm43142a0 Driver Windows 10 64-bit Dell
Let’s be honest: the Bcm43142a0 is outdated. It does not support 5 GHz, Wi-Fi 5 (802.11ac), or WPA3. If you frequently experience issues despite following this guide, consider replacing the Wi-Fi card. If all else fails, the hardware itself is the bottleneck
Before purchasing, verify your laptop does not have a soldered Bcm43142a0 chip (most Inspiron 15 3000 series have mini-PCIe slots, while some ultrabooks have soldered chips). Those have native Windows 10 64-bit drivers and
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