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.
Receiving a .dll error on startup typically means a startup program is trying to access a missing .dll or remnants of old software. Ensure all programs are correctly installed and that there are no leftover traces of old software.