Hi Enoch,

PC Reviver is a multi-purpose utility that will diagnose issues on your PC, safely repair them, and provide other maintenance and optimization recommendations. PC Reviver includes advanced diagnostic tools that will perform a comprehensive and complete scan to find issues with your PC. PC Reviver will safely fix these issues and perform other optimizations to restore optimum performance and stability to your PC.

Whereas Driver Revivier is a different software.
Driver Reviver will scan your PC to identify out of date drivers. Driver Reviver can quickly and easily update these drivers to restore optimum performance to your PC and its hardware and extend its life. By keeping your drivers updated, you are ensuring that you continue receiving updates containing bug fixes, performance improvements, and potential new features from the manufacturer.Installing the wrong Driver or malware could render your PC inoperable and potentially put you at risk. Driver Reviver ensures accurate detection and consistently delivers the correct drivers. It can take numerous hours to track down each Driver for each single piece of hardware connected to your PC. Driver Reviver accomplishes this in minutes through a quick scan and update process. Driver Reviver is unbelievably easy and quick to use and include safety features like automatic backups, restore wizard, exclusions, scheduler and more to keep your computer in good shape.

I hope this helps.

Regards,
Lokesh