System unable to detect hardware after update
4.5
Your WiFi, Bluetooth, or Sound card has vanished from the system after an update.
Symptoms
- "No audio output device"
- WiFi icon missing
- Unknown device in Device Manager
Possible Causes
- Driver replaced by generic version
- Hardware disabled by OS
- Firmware mismatch
Step-by-Step Fix
1
Roll Back Driver
Device Manager > [Device] > Properties > Driver > Roll Back Driver.
2
Scan for Hardware Changes
Right-click the computer name in Device Manager and select "Scan for hardware changes".
3
Download OEM Drivers
Visit your laptop manufacturer's site and install the specific driver for your model.
When to See a Technician
Windows Update often tries to install "newer" drivers that aren't actually compatible with your specific hardware.
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