Laptop slowing down when gamepad is connected

Greyfalcon

Estimable
May 10, 2015
8
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4,510
Hello,
I am running Win 8 on my Lenovo E50 laptop. My laptop slows down whenever I connect my usb gamepad/controller. This only happens when my laptop is connected to the internet. I have wired broadband connection. So whenever i have my Ethernet cable connected to my laptop and then connect the USB controller, my laptops becomes slower than a snail.

Note that this does not happen when only the controller is plugged in. It happens only when both the things are connected. So is I have to use the controller i have to disconnect the ethernet cable

Now i know that this laptop is pretty low-end, but still i don't think a usb controller should slow it down so much.
Can anyone please tell me how and why this is happening?

Thank You