Recovery after HDD failure

This is a hypothetical scenario but one that many will have to deal with in the real world.

Scenario

Type : Desktop PC
OS : W8.1 with all updates

Internal HDD : 1 disk - System C: Data E:
Recovery Drives : a) USB Flash W8.1 Recovery Drive and b) USB HDD W8.1 System Image
Data Backup Drives : USB HDD

Recovery software : W8.1 Recovery Drive and W8.1 System Image (no 3rd-party imaging software)
Backup software : W8.1 File History (no 3rd-party backup software)

User experience : Non-technical but is comfortable carrying out clear instructions.

Problem

Internal HDD failure rendering the disk as unusable and inaccessible.

Question

What is the best procedure for a non-technical User to follow to recover their system in a reasonable time-frame?

Assumption

Assume that the User has a spare formatted HDD and the necessary ability to remove and replace the failed HDD.

T.
.