Why does my computer keep disconnecting from Bluetooth devices?

Bluetooth operates in the same crowded frequency range as much of the wireless world, and most disconnection problems trace back to interference, power management, or a stale pairing.

Interference is the leading cause and the least obvious. The band is shared with wireless networks, many cordless peripherals and microwave ovens. A device sitting behind a laptop screen, or with a receiver plugged in on the opposite side of the machine from where you are sitting, has a much weaker link than the distance suggests. Metal surfaces and even your own body between transmitter and receiver matter more than people expect.

Power management is the second cause and produces a characteristic pattern: the device disconnects after a period of inactivity and reconnects when used. Operating systems are permitted to power down the radio to save battery, and the setting that allows this is enabled by default on most laptops. Disabling it for the Bluetooth adapter resolves this class entirely.

A corrupted pairing produces intermittent failure that survives restarts and resists every other fix. Removing the device entirely and pairing again from scratch clears it, and is worth doing early because it costs a minute.

Battery level is worth checking even when the device reports itself as working. Many peripherals become unstable well before they report themselves as empty, and the symptom is dropping rather than dying.

Finally, driver and firmware versions matter more here than in most areas. Bluetooth stacks are updated frequently, and a machine running the version it shipped with is a plausible cause on its own, particularly after a major operating system upgrade.