Computer won't boot, possible causes? Motherboard or CPU
74385
Any way to tell apart a CPU defect from a mainboard defect?
150811
Ubuntu 16.04 freezes on login screen, no keyboard or mouse working
87551
How to repair grub?
30233
How can I fix/install/reinstall grub?
9254
I get a "serious errors while checking the disk drives for /boot" error while booting
5413
How can I repair grub? (How to get Ubuntu back after installing Windows?)
105222
Windows 8 won't boot via GRUB after installing Ubuntu with boot-repair
72845
Ubuntu won't boot with Windows7
102209
How to determine why Win7 machine is crashing?
151403
Windows 7 booting fail with error code 0xc0000225
58548
Getting a black screen when installing or Live booting Ubuntu (any version) in my laptop
67935
Windows 7 won't boot after installing Ubuntu 11
58895
How can I identify the culprit of my slow Windows shutdown?
67834
UEFI/BIOS seemingly missing
145654
How do I tell which components survived after a power supply failure?
49773
Computer unstable at lower temperatures
79817
How do I troubleshoot random rebooting?