The way to get regedit.exe is to use the version already built into your Windows operating system. Because it is a core system utility, you generally do not need to download it from external websites, which can often be risky or unnecessary. How to Access the Built-in Registry Editor

Are you seeing a specific when you try to open the Registry Editor?

If the file is actually damaged or deleted, you can repair it using built-in Windows recovery tools rather than a manual download: