When the mouse does not work in the BIOS, you can follow the following steps to troubleshoot: 1. Check the USB interface type and enable the "USB Legacy Support" or "XHCI Hand-off" options in the BIOS; 2. Try to replace it with a simple wired optoelectronic mouse to eliminate the compatibility issues of wireless or high polling rate devices; 3. Update the motherboard BIOS to the latest version to improve compatibility; 4. Use keyboard arrow keys, Enter, Esc and F10 shortcut keys to replace the mouse operation. Most cases are setup or compatibility issues, which can usually be solved through the above steps.

It is really a headache to not work in the BIOS. Especially when you need to overclock, adjust the startup sequence, or check the hardware status, the mouse has no response at all and can only rely on the keyboard to operate. It is inefficient and easy to make mistakes. In fact, this problem is not uncommon, and it is not necessarily the mouse that is broken. In many cases, it is a setting or compatibility issue.

The following situations are quite common, and you can check them in order:

1. Check USB interface type and BIOS settings

Some motherboards (especially old models) only support mouse operation on specific interfaces. for example:

• USB 3.0 may not be supported by early BIOS . Plug it into the USB 2.0 interface and try it.
• After entering the BIOS, find out if there are any options similar to "USB Legacy Support" or "XHCI Hand-off" to make sure they are on.

Sometimes these functions are turned off by default, especially if you enter the BIOS for the first time after installing the new system, the mouse cannot move.

2. Problems with the mouse itself: wired/wireless, protocol differences

Not all mice can be used in the BIOS, and several common reasons include:

• Wireless receivers are used, while motherboards have limited support for wireless devices
• The mouse has a high polling rate (such as 1000Hz), and the BIOS may not recognize it.
• Insufficient mouse power supply, resulting in the inability to initialize normally

It is recommended that you try changing to a basic wired mouse, preferably the optoelectronics type, and do not use e-sports mouse with too many extra functions. If it can be used after changing, it means that the original mouse may not be compatible with the current motherboard's BIOS environment.

3. The BIOS version is too old and needs to be updated

If your motherboard BIOS version is older, it may not support well for new models of mouse or USB controller. You can go to the motherboard official website to check whether there are new BIOS updates. Updating the BIOS is a bit risky, but it usually solves some underlying compatibility issues.

Remember before update:

• Back up the current BIOS settings
• Make sure the power supply is stable and do not turn off
• Follow the methods provided by the motherboard manufacturer, don't do it randomly

4. Use keyboard alternatives

If you really can't handle the mouse, you won't be completely helpless. Most BIOS interfaces can be operated with a keyboard:

• Select item by arrow keys
• Enter key confirmation
• Esc returns to the previous level
• F10 save and exit (different motherboards may vary slightly)

Although it is not as intuitive as the mouse, you can quickly complete the basic settings after you are proficient.

Basically, these common reasons and solutions are all about them. When encountering this situation, don’t be too anxious. Start by changing the interface and changing the mouse. In many cases, there is no big problem, it is just a small compatibility pit.

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