Why does my Wi-Fi die only during Zoom calls?

Your Wi‑Fi usually isn’t “dying” because of Zoom — Zoom is exposing a weak spot in your network. Video calls need steady upload, low latency, and low packet loss, so problems that don’t bother browsing can make Zoom freeze or drop.

Most common causes

• Upload is maxed out: Home internet often has much slower upload than download. Turn off Zoom HD, pause cloud backups/file sync, and stop other uploads during calls.
• Router overload / bufferbloat: A busy or older router can build up delay. Try QoS/device prioritization, or upgrade the router if it’s weak.
• Weak or crowded Wi‑Fi: 2.4 GHz is more interference-prone than 5 GHz or 6 GHz. Move to a faster band if you can.
• Wi‑Fi adapter power saving/driver issues: On Windows, disable “Allow the computer to turn off this device to save power” for the Wi‑Fi adapter, and update the driver.

How to tell what’s happening

• Wi‑Fi disconnects completely: likely adapter, driver, or router trouble.
• Wi‑Fi stays connected but Zoom says unstable internet: likely bandwidth, latency, jitter, or packet loss.

Start by checking upload usage, then try 5 GHz, then QoS, then adapter settings.