CompTIA A+ Core 1 (220-1201)Hardware and Network TroubleshootingMedium
A client reports that their external USB hard drive is not recognized by their computer. The technician confirms the drive is powered on and spins up, and has tried different USB ports and cables. Other USB devices work fine on the same ports. Which of the following is the MOST appropriate next step in troubleshooting?
- ARun a full system antivirus scan.
- BReplace the computer's motherboard.
- CUpdate the computer's BIOS/UEFI firmware.
- DCheck Device Manager for unknown devices or driver issues.
Show answer & explanationAnswer & explanation
Correct answer: D. Check Device Manager for unknown devices or driver issues.
Since the drive powers on, spins up, and basic connectivity (ports/cables) has been ruled out, the issue likely resides with how the computer's operating system is interpreting or communicating with the drive. Device Manager will show if the device is recognized at all, if it has a driver issue, or if it's an 'Unknown Device'.
Why the other options are wrong
- A. An antivirus scan is unlikely to resolve a hardware recognition issue for an external drive, although malware can cause general system instability.
- B. Replacing the motherboard is a drastic step and premature when software/driver issues haven't been ruled out, especially if other USB devices work.
- C. Updating BIOS/UEFI is a complex step and typically not necessary for basic USB device recognition unless there are known compatibility issues with very new hardware.
USB Device Not Recognized
When a USB device is not recognized despite power and physical connection, the next step is to check Device Manager for driver issues, unknown devices, or device status.
- Verify physical connection and power first
- Rule out faulty cables or ports
- Device Manager shows OS hardware status
- Driver issues are common for new/problematic devices
Memory trick: Device Manager Detects Driver Deficiencies.