Original post : 0x0000124 (WHEA UNCORRECTABLE ERROR): Fix for Windows.
Your PC ran into a problem and needs to restart. We're just collecting some error info, and then we'll restart for you. (0% complete)
If you'd like to know more, you can search online later for this error: WHEA_UNCORRECTABLE_ERROR
chkdsk C: /f
Windows Memory Diagnostic
For more information and methods to reset BIOS to its default settings, read this guide.
chkdsk c: /f /x /r