I've always had issues with restoring a backup and being no better off.
I recently lost the ability to boot my Sonar drive, restored a backup (Acronis 2015) and it still would not boot.
I persevered a bit and found that I could put the windows 8 cd in, go to advanced/command line and type in
bootrec.exe /ScanOs
This shows any windows installations which have not been picked up by the boot configuration (why the boot config isn't part of the backup I don't know!)
Anyway, it's all working fine again, I seem to get the problem every few months where the MBR gets corrupt or something. *shrugs