I have a Lenovo B50-80 and had the same problem. I went on to the Lenovo support site and downloaded the BIOS update utility (http://support.lenovo.com/nz/en/products/Laptops-and-netbooks/Lenovo-B-Series-laptops/Lenovo-B50-80-Notebook/downloads/DS102219). After installing an update to the BIOS...
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