I have never seen Windows 10 on a 2 GB hard drive. It needs 20 GB at least.
If it doesn't boot of an optical disk one of 4 things are wrong:
1. Not a bootable disk. Try on another PC.
2. Bad drive. Try another drive.
3. Not set as first boot device. Change in BIOS.
4. Bad motherboard. Replace.
disk boot failure windows 10 has a 2 gig hard drive 8 gig ram Gigabyte Ultra Durable tm 3 motherboard
shut down Saturday fine no errors turned on sunday got black screen after post with disk boot failure that's all it will do
won't boot into windows off a system disk get same error after post
changed hard drive still the same .just changed cmos battery still the same ,might get a new Sata cable and see if that sorts it out
this not a new machine probably about 14 years old or so but has been working fine till now