Chosen Solution
Hello everyone i have a lenovo g510 laptop, during one of my projects with arduino i guess i passed 12v through my usb ports. now the two 3.0 ports have stoped working. Pls help me as my warenty has just expired Lenovo IdeaPad G510
Go to device manager, unnistal the usb 3.0 from the Universal Serial Bus controllers and then scan for hardware changes. That work for me.
