Hang after updating configuration

I’ve some problems on my NT 4.0 Server,
every time i changed my Internet Explorer configuration in control panel,
or directly from desktop icons, like changed proxy server settings,
I got my server hang on RUNDLL32.EXE,

I’ve already tried manythings, from uninstalling internet explorer,
until try to find program that can resolve my problems,

can u give me some ideas,

and then,

Where can I get “mv.exe” (NT 4.0 server resource kit), plz send me one

Best Regards,
Lim Seng