In this visualization of the Linux boot sequence, each function is a node, and each line connecting the nodes represents a call, direct branch, or indirect branch.

The bootchart utility creates a PNG image that details exactly what process is loading during the boot sequence. Ubuntu users can install bootchart using: sudo apt-get install bootchart.

Often, it’ll say something like “Press F12 to Choose Boot Device” somewhere on the screen—the requested function key could vary depending on your machine. Press that key now. Wait a second ...

Look for a "Boot Sequence," "Boot Order" or "Boot Priority" setting. Select "IDE," "PATA" or your IDE drive's specific model number from the first position of the boot sequence.

If you want to boot from a USB drive or an external drive, you need to change the boot order on Windows 11/10. The usual default is set to the first hard drive connected to the PC.

Some users have complained about this problem that when they start their computer, it doesn’t boot. Instead, a Default Boot Device Missing or Boot Failed blue colored screen is displayed on ...