Locate the unconfigured device. It will usually appear under with a yellow exclamation mark, labeled as FFUSB , USB Serial Port , or Unknown Device . Step 3: Update Driver via INF File Right-click on the target device and select Update driver . Click on Browse my computer for drivers .
Since “4 in 13” can mean different functions, here’s how to fix the most common ones: ffusb 4 in 13 driver