"A usb device is not operating properly and exceeds the hub" appears because the USB boot option in the BIOS is not turned on or is not set correctly. The solution is: first open the registry; then find the registry key "UsbStor "; Finally, change the "Start" numerical data to "1" and restart.
A USB device is not functioning properly and has exceeded the power limit of its hub port?
This is mainly due to the fact that the USB boot option in the BIOS is not turned on or set correctly. After entering the CMOS settings, in the system startup sequence, there are "FDD USB" and "HDD USB" options. This is the USB startup option, so the system startup sequence should be set to USB first. However, some old motherboards do not support USB boot, so flash drives cannot be used.
To modify the registry, start----Program----Run, enter regedit
to enter the registry
Find the registry key HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet \Services\UsbStor, change the "Start" value on the right to 1 (in hexadecimal), confirm and restart to take effect.
This way you can use the USB interface
Another possibility is that the power supply of the USB interface is insufficient, please use a USB extension cable to connect it
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