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This is not an error from Windows but this is an issue in BIOS or UEFI and you need to check with your device manufacturer.
It could be due to hard disk issue. Are you using SSD or HDD drive?
Default Boot Device Missing or Boot Failed
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(128, 8%, 22%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EA%3C/text%3E%3C/svg%3E)
Anonymous
Hi there, I'm having this issue multiple times and restarting my pc has always solved this issue but I currently can't restart my pc because I'm still working on my unsaved school project, is there any way to solve this issue without restarting my pc?
Windows for home | Windows 10 | Performance and system failures
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