I made a mistake by accidentally formatting a drive that a customer’s data was on. I was able to recover a 451GB partition with their files, and now begins the real challenge.. Getting it to boot back up.

Helpful articles:

 

Windows 7 100 MB system recovery partition missing prevents system from booting.

Can’t boot after deleted System Reserved Partition

Missing system partition – Google Search

General Partition Info from MSFT

Configuration of Partitions by MSFT

BIOS/MBR Specific KB Partition Doc by MSFT