When I open "Regedit" - "HKEY_LOCAL_MACHINE" and "HKEY_USERS" a number of points that has the same name.
Can these are marked on the image be deleted or they still have a function. ?
What software is the best reg cleaner (currently using "CCleaner")
My advice is don't. Deleting stuff without knowing what they do is very risky. Windows 10 does not really care if there is stuff in registry if it does not use it.
Registry cleaners are like powersaws - in the wrong hand, you can cause chaos.
If you are going to mess around deleting stuff, make a full image backup of pc first.
If you don't know for sure what you are going to delete in your registry, then I suggest you don't remove ANYTHING!!! CCleaner is a SAFE registry cleaner. You should also ALWAYS make a Complete Image Backup of your C drive, lots of us use Macrium Reflect which is a Very Good backup program and is Free.
Macrium Reflect Free
None of the items in the screenshot have the same name. If you look closely you will see that some of the names are very similar but by no means the same. They are all unique, all important. VERY important.
Regedit is a very powerful and useful tool. But like all such it requires considerable knowledge and skill to be used safely and effectively. In the hands of a skilled surgeon a scalpel is a life saving tool. In the hands of the unskilled it is a dangerous weapon. Huge difference.
There are a couple of important things about Regedit that are important to know but far from obvious:
1. In a typical text editor making changes to a file is a 2 step process. You make the editing changes and when you are satisfied you click save. In Regedit there is no save function. All changes are immediate.
2. Most text editors have an undo facility. Regedit has no undo of any kind. All changes are permanent.
The only way to recover from a mistake in Regedit is restoring from a backup. That assumes you made one before the changes were made.
Most computer users should consider the registry as read only. Look but don't touch, and even then exercise due caution. That goes double for keys like HKEY_LOCAL_MACHINE and HKEY_USERS, and others as well. This is for experts only who REALLY understand what they are doing. It only takes a few mouse clicks to do extensive damage.
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