Thank you for your reply.
I tried solutions ① and ② that you suggested, but the situation did not improve.
What does it mean when only input devices are not recognized?
If I were to initialize the PC and then reinstall Windows, would the situation improve?

Thank you for your help.
I performed a clean install of Windows 11 and reinstalled all the drivers, but the situation did not improve at all.
The four USB ports on the back still only recognize flash memory.
When I connect a mouse, keyboard, or gamepad, they are not recognized. There is not even a sound that is made when a device is connected to the USB port. However, when I connect a gamepad, only the battery is charged.
When I connect the flash memory, I can hear the connection sound.
I am at a loss as to what to do.

① Open Device Manager.

Expand Universal Serial Bus controllers.

Right-click each USB Root Hub > Properties > Power Management.

Uncheck Allow the computer to turn off this device to save power.

Repeat for all USB Root Hubs and HID-compliant devices.

② Please repeatedly press delete key as soon as you turn on the PC, go to BIOS. On Save&Exit page, please click Restore defaults, press enter to confirm, then press F4 to save.

③Please press delete key as soon as you turn on the PC, so that you can go to BIOS. Please send us a picture of the Main page.
We will check if you need to update the BIOS.

Thank you for your reply.
I have performed solutions ① and ②.
However, the situation has not improved.
I will send you an image of the BIOS as ③.
I will also send you an image of the PC’s serial number just to be sure.
I would like to continue using this PC.Image description
Image description

    PECO Hi there, your BIOS is the latest one. Did the ports work fine before you perform the windows update ?

      Thank you for your reply.
      It seemed to be responding normally until I ran Windows Update.
      However, many programs were downloaded in the Windows Update that I ran just before, so I don’t know which update program is affecting it.
      I then did a clean install of Windows 11, but the situation did not improve.
      I also tried a clean install of Windows 10, but the situation did not change.

        support1
        Thank you for your reply.
        I followed your suggested method.
        I tried reinstalling it from the files you provided, but that didn’t improve the situation.
        The four USB ports on the back are still unresponsive to input devices.

            PECO Hi there,

            Step-by-Step Solution:

            1.Test HID Devices in BIOS:

            Connect the keyboard to a rear USB port and repeatedly press the BIOS key (e.g., Delete/F2) during startup.

            If the keyboard works in BIOS, the issue is likely software-related in Windows. If not, it points to a hardware/BIOS problem.

            2.Inspect USB Ports Physically:

            Check the rear USB ports for physical damage (bent/missing pins, debris). Use a flashlight for better visibility.

            Try different rear ports (USB 2.0 vs 3.0). Some devices may not work on USB 3.0 ports without proper drivers.

            3.Update/Chipset Drivers Manually: Here is the driver https://url.bee-link.cn/jJ6e

            4.Check Device Manager for Errors:

            Open Device Manager (devmgmt.msc).

            Look under Universal Serial Bus controllers for warnings (yellow exclamation marks) or unknown devices.

            Right-click and update drivers for any problematic entries, or uninstall them and restart to let Windows reinstall.

            5.Disable USB Selective Suspend System-Wide:

            Go to Control Panel > Power Options > Change Plan Settings > Change Advanced Power Settings.

            Under USB Settings, disable USB selective suspend setting for both battery and plugged in.

            BIOS Configuration Check:

            Enter BIOS and ensure settings like:

            Legacy USB Support: Enabled.

            XHCI/EHCI Hand-off: Enabled.

            USB Configuration: All ports enabled (no “Auto-Disable” feature).

            Restore BIOS defaults again if unsure, then save and exit.

            6.Test with Linux Live USB:

            Create a Linux Live USB (e.g., Ubuntu) and boot from it.

            Check if rear USB ports recognize HID devices in Linux. If they do, the issue is Windows-specific.

            If all steps fail, the USB controller for rear ports may be faulty. Then you might need to send it back for repair.

              Thank you for your reply.

              Thank you for providing a detailed solution.
              I tried steps 1-5, but it didn’t improve the situation.
              I didn’t try step 6 because it’s a bit advanced for me.

              So I think I might need to get it repaired.
              I like the design of this PC, so I’d like to keep using it if repairing it would solve the problem.

                support1

                Thank you for your reply.

                I have sent an email to the support service, so we will contact you.