Default Boot Device Missing or Boot Failed message on Lenovo Yoga 920! Please help!!
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Fix Windows boot manager has been blocked by the current security policy
Fixed – Default Boot Device Missing or Boot Failed on Lenovo/Acer - MiniTool
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Effectively Solved: Default Boot Device Missing or Boot Failed
Lenovo Y540, keep getting this error every 2 or 3 weeks, Default Boot Device Missing. After restarting, gives a BSOD "WHEA Uncorrectable Error" then after restarting again, everything is fine. Both SSD
Default-Boot-Device-Missing-or-Boot-Failed - English Community - LENOVO COMMUNITY