Guys, I can't believe this, but I want to tell you what happened to me.
I recently bought a PC that has UEFI BIOS, but also has Windows 8.1 installed in UEFI mode.
Tried to create a new partition, in order to dual boot with 7. All hell broke loose.
Before partitioning, I of course, made an image backup. Proceeded to make the partition, only to find that I couldn't boot up after.
Some error about the needed drive wasn't connected or available.
So, I tried to blow in the backup, and I couldn't boot to DVD. Unless the DVD was a recovery disc with the OEM stuff on it. So I did, but I couldn't believe that they took away our ability to restore from a backup image.
Then, I went into BIOS and figured out how to turn off secure boot and enable legacy boot options and did manage to get the backup to install, only to still fail to boot up.
Called HP Support, went through 4 techs and 2 supervisors and was told that with a UEFI BIOS on an OEM rig, running Windows 8 that was installed in UEFI mode, you cannot install from a backup.
Only a factory reset would work if you can't boot. Which is totally ludicrous, IMO. Why make a system that can't use a 3rd party backup? People lose everything with a system factory recovery, or even Windows 8's reset/refresh.
They kept trying to blame my 3rd party backup program, Easeus ToDo. Bullshit.
After hours with HP on the phone, I'm ready to go postal.
So, ten minutes after hanging up with HP Non Support, I got it done. Finally.
I had to completely disable UEFI mode in BIOS. Enable legacy boot options, turn off secure boot. Install the backup, then run startup repair from a Windows 8 disc.
Guess I won't be dual booting, since I'm now afraid to try.