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Her computer was following a strict set of instructions called the . This is a priority list stored in a special chip on the motherboard (the BIOS/UEFI) that tells the computer: "First, check the USB port. If nothing is there, check the DVD drive. Finally, boot from the hard drive."

By default, most Windows 10 PCs put the hard drive first. Maya needed to change that to give the USB drive top priority.

Inside, she saw a screen that looked like a blast from the 1990s (text-based) or a sleek modern interface with mouse support. She found the tab.

She inserted the drive, restarted the computer... and Windows booted normally again, ignoring the USB stick entirely.

She learned that the boot order is like a bouncer at a club: it decides who gets in first. And with a few key taps at startup, you can change that bouncer's list anytime.

It was a quiet Tuesday when Maya’s Windows 10 desktop started acting up. A blue screen. Then another. Her files were backed up, but the operating system itself was corrupted. She needed to reinstall Windows from a USB flash drive.

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