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A personal computer that resides in one location with its core components inside a case separate to third-party peripherals required for operation, such as a mouse, keyboard, and monitor.

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My computer doesn't recognize keyboard and mouse

I updated my windows 7 desktop computer with an MSI motherboard and an Intel processor. Now my keyboard and mouse is not recognized by the computer.

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Hi @yomary ,

What is the model number of the motherboard?

Can you access the BIOS area by using the keyboard, usually you have to press Del key to enter BIOS (press between start up and Windows boot - during MSI logo splash screen time) but sometimes it is the F2 key.

What type of keyboard is it USB or an older PS2 connection?

If USB are you using the USB ports on the back of the case i.e. the motherboard USB ports, or the ones on the front panel of the case, which means that they may have to be connected to the motherboard?

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If this is a motherboard and CPU upgrade without re-installing windows then the chances are this is a missing device driver issue.

You will need to install the device drivers for the USB ports with can be obtained from the motherboard manufacturer website you can search up the model of your motherboard then look under the support / download section for drivers for your motherboard.

In most cases this should be plug and play.

Try plugging the keyboard and mouse in the black / USB 2.0 ports if they are currently plugged into blue / USB 3.0 ports. USB 3 drivers need to be installed manually as said above.

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Thank you for your responses to my post.

The motherboard is an MSI B360 Gaming Plus and the CPU is an Intel Core i5-8400 LGA 1151. I am using a Dell keyboard and a Ligitech mouse. When I'm in the BIOS, it references Windows 10 configurations which leads me to believe that this motherboard doesn't support my Windows 7 operating system. If this is the case, is there any work around, short of upgrading to Windows 10?

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Hi @yomary ,

Check Legacy USB support in BIOS and ensure that it is NOT disabled.

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Hi jayeff,

I'll check the Legacy USB - I do remember seeing that option in BIOS, but don't recall the setting. Thanks!

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1 Answer

Mary:

Your motherboard has a PS/2 combo port. You could get a PS/2 splitter cable, splitting the port into two ports -- a keyboard port and a mouse port.

Here is an example of a PS/2 splitter cable:

https://www.amazon.com/KEYBOARD-SPLITTER...

Then get yourself a PS/2 mouse:

https://www.amazon.com/Logitech-M-SBF96-...

...and a PS/2 keyboard:

https://www.amazon.com/dp/B0075W8C8S/ref...

Make sure your computer is powered off when connecting or disconnecting the PS/2 mouse, keyboard, or splitter cable.

Sometimes USB fails; but PS/2 ALWAYS works.

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Hi JimPhelps,

Thank you for the suggestion. I already have the splitter and will pick up the keyboard and mouse tomorrow. I'll follow up with the results.

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It is possible that you have plugged your keyboard and mouse into USB3 ports. Windows 7 doesn't natively support USB3. Typically you can tell if it's USB3 if the tab in the port is blue. Try USB ports that are not blue for your keyboard and mouse.

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Hello Mr JimPhelps,

I tried the splitter with the keyboard and mouse. Neither connected, however I was able to get a connection when I connected the keyboard directly to the PS2 port which left me with a connected keyboard, but still no mouse.

I tried connecting my keyboard and mouse to the USB ports that are not blue, but unfortunately I still can't get a connection.

Thank you for your suggestions.

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I'm glad you were able to get your keyboard working.

Here are some keyboard shortcuts you might try, in order to negotiate your way around Windows without a mouse:

https://support.microsoft.com/en-us/help...

Once you are in Windows, your USB mouse and keyboard may start working after a few minutes. And once they start working, they should keep working from that point forward, including when you first power on the computer.

If the USB mouse and keyboard never start working, you likely have a USB problem. In that case, go into Device Manager and see if there is an error marker (yellow triangle) next to any of the USB devices. If any of them have an error marker, right-click on them and choose uninstall. Then right click on the very top item and choose "Scan for hardware devices" (or however it is worded). Hopefully this will fix the USB issues which are causing your USB mouse and keyboard not to work.

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Mr JimPhelps,

I appreciate the great keyboard shortcuts. I'll also check my Device Manager and confirm if I have any error markers next to the USB devices. You have given me some really good suggestions! Thanks

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Mary T will be eternally grateful.
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