RegSvr32 is a built-in Windows utility tool that is used to register system files. You must open the Command Prompt (cmd) as an Administrator to use this feature.
To register the .dll file, open Command Prompt as an administrator, enter the installation folder, and run the "regsvr32" command. You'll receive a confirmation if the .dll file is successfully registered.
Unregistering a DLL file deletes the .dll information from the Windows registry. Keep in mind some DLL files can't be unregistered.
Its common to find multiple versions of the same .dll on a system because different applications might depend on different versions of a particular .dll file, leading to multiple versions being stored in various locations.