There were dozens of reports of the same problem from other owners of that model, yet they refused to acknowledge the issue was theirs or offer any self-serve option (I remember most laptops nowadays can re-flash the BIOS from an attached USB with specific format and layout, but I presume they saved a couple of cents by removing that feature from the Flex models). Luckily the laptop was still in warranty and I got it "fixed" after 6 weeks, but will never purchase another Lenovo product again.