Laptop scanner not detected
4.5
The scanning software reports that no scanner is connected.
Symptoms
- "Scanner not found"
- WIA error
- App crash
Possible Causes
- WIA service disabled
- USB port issue
- Twain driver missing
Step-by-Step Fix
1
Restart WIA Service
Ensure "Windows Image Acquisition" service is running.
2
Check USB Connection
Try a different port and cable.
3
Use Windows Scan App
Try a different software to rule out app-specific bugs.
When to See a Technician
Scanners often need a separate "Twain" or "WIA" driver package from the printer driver.
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