"Interactive Services" - Problems

Hello. I have recently installed Vista Business on a Dell
Optiplex. Whenever I access a particular application, a message box
tells me that "A program can't display a message on your desktop."
The details on the message box say that there is a partial
incompatibility with Vista. I can close the message box, but it
continues to pop up every few minutes.

The application program seems to work fine, however. The message box
is just incredibly annoying!!!

My Windows services are set for "Interactive Services" to use the
"Manual" Startup Type, but the status is currently started.

MY QUESTION: Is this simply a notification box only? Will stopping
or disabling this service cause any security problems.... or will it
simply halt the notifications?

I'm confused.

Thanks,
Jessi