Msntb.dll is a file that normally gets installed when you install MSN
Messenger. It adds an MSN toolbar to Internet Explorer.
You may have installed either MSN Messenger or its replacement, Windows
Live Messenger. Reinstalling the software will restore the missing file.
Errare humanum est
> When trying to attend an Webinar, once I logged into the session I received a
> message Internet Explorer has a problem and must disconnect. By looking at
> the screen, it could not find the add on msntb.dll. I have not received this
> error before. I am running version 7.0.5730.13. Any suggestions?