When I do that I get "Error loading operating system" again. WTF? So, anyone know how I can fix this because right now I have a computer whose only function is BIOS ...

Hey guys-My brother's hard disk went out on his Dell so I'm installing an older 45 gig IBM of mine for him. I took his out, put mine in, and booted up. I was prompted to install a boot disk, so I ...

While booting a Hyper-V virtual machine, if you get No operating system was loaded error, this guide will help you fix the issue.

To fix Operating System Loader has no signature, Incompatible with SecureBoot, All bootable devices failed Secure Boot verification error, follow these steps.