Klen

For some reason, when i start lenovo laptop where i have linux mint installed , it report some error "usbhdid" , shows a lot of //////////////////////, then there is animated underline which keep going and then it nothing happens. After dozen of restarts, somehow i managed to get into OS, so now i keep it online all the time in order to get things going. And same thing happens if i try to load mint live cd. Any idea what could be problem? Maybe broken usb port?
I still have warranty so i can send it to repair , but the problem is i dont have backup PC/laptop at the moment except one HP laptop which is not suitable for work and who knows how much time it will take to come back.