What is BT-ERR-43?
Bluetooth adapter error 43 (BT-ERR-43) is a medium-severity fault affecting the motherboard. Bluetooth has stopped working, the icon has disappeared and the device is reporting Code 43. Common triggers are chip firmware (Intel/Realtek) stuck due to static electricity and outdated Driver. Work through the steps below in order.
Common Causes
- Chip firmware (Intel/Realtek) stuck due to static electricity
- Outdated Driver
Step-by-Step Fix Guide
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1
Unplug the PC from the socket, hold the power button for 30 seconds to discharge the capacitors and plug in (Hard Reset)
In our testing, Unplug the PC from the socket, hold the power button for 30 seconds to discharge the capacitors and plug in (Hard Reset) alone clears up BT-ERR-43 more often than any other single step.
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2
Remove the device via Device Manager and reboot
Repeat occurrences typically trace back to less obvious mobo instability factors, addressed in the steps ahead.
Commands & Diagnostics
devmgmt.msc
Frequently Asked Questions
BT-ERR-43 is most often triggered by chip firmware (Intel/Realtek) stuck due to static electricity. Other reports point to outdated Driver as contributing factors.
Most BT-ERR-43 reports resolve after "Unplug the PC from the socket, hold the power button for 30 seconds to discharge the capacitors and plug in (Hard Reset)". The rest of the guide above is there for the cases that don't.
BT-ERR-43 is a medium-severity issue. It can affect system stability, but the fix steps above typically resolve it without lasting damage.
In most cases, yes — the guide above resolves BT-ERR-43 without a clean install. Treat a reinstall as the last resort, not the first move.
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