usb hub

Hi! This is my first post on this forum, so hello to everyone and thank you :) I have an issue with my laptop (Lenovo Z50-70): some days ago I plugged in a powered USB hub to the computer, and just after that it shutdown and nothing happened after a few minutes, when I was able to turn it on...

Hello Everybody! I am going to buy a self powered usb hub, because my laptop gets warm very often. So it should reduce the power used by usb ports, helping to cool the cpu. I am not an expert in the subject, but i guess if i use a lot high consume usb devices it will work. The devices are...