What issues with this PC are you solving? If those errors are that bad, should the machine be having dire issues?
As to my ranking of such things, I place them at the bottom of what anyone should be doing to a PC. We don't use such at the office.
Bob
I have Ccleaner and Glarey utilities installed on my PC. System Mechanic was recommended by Dell so I ran a scan with it after running scans with the others and after fixing problems System Mechanic found a lot more things wrong then Ccleaner and Glarey had. It found 44 more registry problems, 13 security fixable threats, 2 startup issues and my internet config is not optimized for maximum speed. I didn't fix any issues with Sysem Mechanic as I'm sure I want to use it. Has anyone used System Mechanic and how would you rate it with the others?
Thanks for any feedback.

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic