Because these units are produced by various manufacturers (e.g., Wanqi, YUEHOO, iMars), you must match the firmware to your specific model string (e.g., K2001_NWD_S217953 Reliable Sources: Community forums like XDA Developers

The screen will go black and display a progress bar. Do not turn off the engine or unplug the USB drive while the progress bar runs.

Do not use generic "driver updater" software. Do not click the first Google Ads result. Instead, follow this tiered approach: