How can I fix "DllRegisterServer entry point was not found" errors on Windows 7?

"The answer is in your screen capture:

451 Exploitable Server
See: http://www.sorbs.net/lookup.shtml?117.197.185.192

I went to the URL. I got this message:

Database of vulnerable/hacked servers
Address and Port: 117.197.185.192
Record Created: Mon Dec 28 22:59:36 2009 GMT
Record Updated: Mon Dec 28 22:59:36 2009 GMT
Additional Information: Spam Sending Trojan or Proxy attempted to send mail from/to from=<ordinarilyuc9@vancouverislandwomenssports.com> to=<belial@paticipating.domain> proto=esmtp helo=<bntxwxq>
Currently active and flagged to be published in DNS
If you wish to request a delisting please do so through the Support System.

What this says to me is that your SMTP server is a known vulnerable server. Outlook is protecting you.

Instead of trying to reinstall Outlook, you should consider using a separate SMTP server before jumping to conclusions. Seriously.

I hope this helps."