If you do have another drive that can boot Windows 7, you can use the Disk Management tool to build a new system partition on your existing SATA drive. You have to shrink the existing partition, and create a new partition. Then you can copy the boot files to the new partition using bcdboot.
An APU is an auxiliary power unit. On-board APUs are small jet turboshaft engines that are started to provide electrical and hydraulic power to the aircraft when needed during periods when the engines aren't running. Some aircraft are designed...
This page is about the meanings of the acronym/abbreviation/shorthand APU in the Business field in general and in the Occupation & Positions terminology in particular. Autonomous Production Unit. Part of a job description or requirement related to the particular position.