Booting from the USB is fine.
I'll try recovery mode.
If not, does this mean I have to reinstall Linux and I lose everything on the computer?
If not, does this mean I have to reinstall Linux and I lose everything on the computer?
You can "roll back" to an earlier kernel. If a kernel update, caused some problem, or is suspected of causing an issue you; Reboot, holding left shift key while doing so to invoke the grub menu, then choose "advanced options", There you choose the previous working kernel, and continue boot.
A hard drive dock is cheap. Buy one.
You can access files from any other computer.
Hard drives fail. It's a fact of life.
A hard drive dock is cheap.
Essential equipment and far cheaper than taking your computer to a repair place just to have them copy files to another drive/USB stick.
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