If the steps above fail, the drive's firmware is almost certainly corrupted. This requires a full factory reset using the manufacturer's tool.
A common thread across many of these reports is the presence of an controller chip. Chip information tools like ChipGenius often identify the USB drive as having a VID (Vendor ID) of 058F and a PID (Product ID) of 1234 , which are identifiers for Alcor Micro . The device firmware revision 7.76 is very frequently paired with Alcor Micro controller models such as the AU6989SN series . It is important to understand that this identifier suggests a firmware-level issue originating from the drive's internal controller, not a problem with Windows itself. Usbstor Diskgeneric-usb-flash-disk--7.76
If the drive failed on two different computers, your focus is on the drive itself. If the steps above fail, the drive's firmware
: The device descriptor provided by the internal storage controller. "Generic" implies that the device relies on standard, class-compliant Microsoft drivers rather than a specialized proprietary vendor package. Chip information tools like ChipGenius often identify the
When you plug a thumb drive into a Windows computer, the operating system polls the device's hardware descriptor. It breaks down the information into a highly specific string:
: The Windows driver service key responsible for all USB mass storage class communications. It distinguishes storage devices from human interface devices (HIDs) like keyboards and mice.
The string USBSTOR\DiskGeneric-USB-Flash-Disk---7.76 is a generated by the Windows operating system to identify and load drivers for a specific USB storage device.