1st of all 2 important facts. All programs have specialties, and different users prefer different programs to use. Use the right program for the problem you are seeking.
Lets do the easy first: The reason you found the “RegCure” file in the Temporary Internet Files Folder is because the files were used to setup. After you install a program, many if not most of the time, those files will remain in the Temp folder. You can clean the Temp folder (without harm) at any time. Various firms place the installation files in different places.
Some under the Local Settings\Temporary Internet
Others in the Local Settings\Temp
Other make a New Folder under Local Settings\XYZW and some delete themselves.
2nd:
(1) RegCure is a Registry Cleaner. But it does a different job than CCleaner. CCleaner will not compare System Files nor any loaded Programs with Registry, Obsolete File entries nor deleted file entries – nor will it repair the registry comprehensively.
I use CCleaner to simply clean out standard information which accumulates in the registry. That’s all its good for. But a wonderful program and we can’t complain, because its free.
(2) MalwareBytes is a spy program (Not a Registry Cleaner nor does it do a Registry Repair) nor is MalwareBytes a Anti-Virus Program. I use MalwareBytes to find “Trojans & Malware”. It is an excellent program. In addition to MalwareBytes, I use Trojan Hunter. The reason is: Not all programs will find the same infection(s).
(3) To find a Virus you must use an “AntiVirus Program” [not that a Trojan Program will not find any, but it is severely restricted to find all]. I myself use NOD.
(4) Adware is often considered Malware - and programs that specialize in Malware & Trojans usually will also find Adware.
(5) Make it habit to back-up your Registry at least once a month, and prior to installing a new program. I suggest using a very simple with a small footprint a program called: ERDNT
It’s been around for ages and re-installs the prior registry (your choice by date) in Real DOS mode.
So all you need to do is to boot to a floppy disk – go to where the backup is located and run it.
When you boot up you are running in the older saved registry. Sweet as pie – it just takes one click to save a good registry, and one click to replace the defective registry.
(6) Last: Everyone has its favorite programs, try them and determine which will be your favorite.
Take suggestion but beware there is a lot of bad advise on the web.
The only important part is that various programs do various things.
For instance “JV16 Registry cleaner & repair” allows you to do manual repairs which is a big plus. While with some others you must use a pencil to write down which one you want to do manually or trust the program.
I also use “Registry Mechanic”, (besides JV16). But before you use any of them, back-up your registry before you allow any Registry cleaner [besides CCleaner (which will clean your temporary files)] to go wild.
I have a habit of trusting no program so I take extra precautions - but be your own judge.
demaX