Locate the driver installation files (usually AmUStor.inf or similar). Open the .inf file with Notepad.
How to Fix Alcor Micro "Unknown [FA00]" and Firmware "FA04" USB Errors
The device in question is typically an internal (SD/MMC/MS) connected via the USB internal header. Under normal operation, the device identifies itself as VID_058F&PID_FA04 (Standard Alcor Card Reader).
Before you do any of the above, ask yourself: Do I need the data on this drive?
Seeing "Alcor Micro Unknown FA00 - F/W FA04" on your computer screen is an alarming sight, but it doesn't have to be the end of your USB flash drive's life. It is a clear signal that the drive's internal "operating system" (its firmware) is corrupt. By first securing your data and then carefully using the correct factory tools, there is a significant chance you can restore the drive to working order. Just remember to approach the process with caution, patience, and a clear understanding that the repair will come at the cost of any data currently on the device.
Type in the exact VID/PID of your device found during the ChipGenius scan (the default fallback values are typically 058F and 1234 ). Click , and then select Save InstallDrive . Step 4: Configuring the Low-Level Flash Parameters
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