Well, most software programs including XP and WIN7, pop up a window when you click on the print/fax driver. We have every single pharmacy and office, etc. we fax.
There are ways to do it with a minimal fax driver without much fanfare, but it is important to check out the software. We had a $7,000 Toshiba all-in-one on lease, and we made them take it back, because the interface was so bad. We now have a Xerox, and it is great. Plus, we have Faxil/Imecom which I wouldn't completely recommend. It doesn't use a modem, it uses a Faxboard made by Brook Trout. I won't even tell you what it costs.