A: Absolutely not. Registry cleaner software is often ineffective and can even be harmful. Windows maintains the registry effectively on its own, and many such programs are actually malware in disguise.
Malware or virus infections can cause fast2001.ocx errors. To run a virus scan: fast2001ocx fix
Re-registering the file is the most common and effective fix. It tells Windows exactly where the file is and what it does. A: Absolutely not