What is the reason why i can see 2 keyboards and 3 mice on my device manager?

I had a laptop dell inspiron 1440.I look up on my device manager and i see 3mice and 2 keyboards.I only use 1 keyboard and was plug in inside port of the pc.however i look at the mouse I do plug in 1 mouse and one touch pad.But when i go to my device manager i got 3 mice and 2 keyboards.Is it possible i had keyloggers on my pc?Thanks I hope someone can help.
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More about what reason keyboards mice device manager
  1. someone sometime plugged in those mice and keyboards

    remove them from device manager and reboot . Windows will find drivers for the devices that are still there
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