Do not be concerned, just listen and follow my directions in the links below.
I have been working with computers for 20 years, 10 of them professionally.
I have reviewed over 20 registry programs in my own research for my computer business.
There are many registry programs and most of them do not help much.
The windows registry is very fragile and must be handled as such.
The program I recommend WinASO, has never done any damage in many uses on many computers. It is free for the shareware version.
I use Avast anti virus, Spybot Search and Destroy and Malwarebytes Antimalware. All are free on download.com
No it is not important, and yes is is safe to delete PC tools registry mechanic.
Start-control panel-programs and features.
In the Source section you will find links on how to find, install, and use the best registry program I have ever seen. Also included is a general performance tune computer article that will keep your computer running in top notch shape and out of the computer shop.