Warning:
If you do not know much about computers or the registry settings, it is recommended that you do not change the settings as you could cause your computer to crash and/or be unable to start up. Even seemingly minor changes can lead to programs not working correctly.
1. You can go to "run" & then write "regedit" there. The Registry Editor program will open to the root key. Using the interface, you can change your registry settings there.
2. Use code to examine, insert, delete or change registry keys
3. Have a registry file, and import it. Your computer may be set-up to automatically import keys upon clicking on such a file.
4. There are many Registry Cleaner programs out there which can change registry settings. Warning, many are fake and are in fact malware/scareware designed to get you to buy programs or give out your information.
5. Installing a program generally changes some registry settings automatically. This depends on the program.
Rebooting after a registry change is important because it ensures that the operating system fully integrates the new settings. Many registry modifications require the system to reload configurations and services, which typically occurs during startup. If you don't reboot, the changes may not take effect, potentially leading to system instability or unpredictable behavior. Additionally, some applications may cache registry values, and a reboot clears this cache, applying the updated settings.
Registry
They are located in the registry
A registry file, or most would called it "Windows Registry" is a database that stores hardware, software settings and options of Microsoft Windows Operating System.
In a Windows-based computer, the system registry is a place designed for storing all of the settings within Windows and the applications. It is a collection of very important files that Windows needs to even boot. They store where everything is, all the settings, etc. Not all programs are compliant with the registry and may store their settings in private files. The registry was designed for getting away from all the settings file clutter and for having a common place for all settings for every application you use. Windows 3.1 used INI files, and while most versions of Windows will use them, the preferred place is the registry.
Registry
To disable network access to the registry in Windows, you can modify Group Policy settings or use the Windows Registry itself. Navigate to the Group Policy Editor (gpedit.msc), go to Computer Configuration > Windows Settings > Security Settings > Local Policies > User Rights Assignment, and adjust permissions for accessing the registry. Alternatively, you can set firewall rules to block network access or restrict user permissions to limit access to the registry remotely. Always ensure to back up the registry before making changes.
By default, a backup of the registry system is in My Documents. This can be changed in the system default settings.
This is a registry file kept in the registry and not in your documents. It contains personnel settings for each user. Leave this file alone.
System.dat was first used in Windows 95 and contains part of the Windows registry. The system registry is where all the Windows settings and most of the application and driver settings are stored. It is a very important file and should be left alone, though you could run a registry cleaner and a registry packer and reduce the size of it. Since XP and higher versions of Windows handle the registry more efficiently, it is best in the newer Windows versions to avoid most registry tools (though there is no harm in running a registry packer which does an internal defragmentation of the registry).
(b) ntuser.Dat
Hkey_users