What to do if Win2k/XP won't let you add a fax printer for your modem, 
popping an error like: "please verify your modem is installed correctly"
****

So far, you should have a working modem, ie. you can dial up successfully.
If you can't, you have to troubleshoot that first.

After that, in Control Panel > Fax > 'Advanced' tab >

'Open Fax Service Management Console', your modem should be listed.  I've 
not seen a problem where a working modem hasn't been listed there.

Get rid of all relevant windows.

Go into Control Panel > System > Hardware > Device Manager and uninstall 
your modem.  The fax service might then pop an error on the lines of the 
modem being disconnected, it might not*.

Make sure the spooler and fax services are started ok.

Redetect the modem (Right click in Device Manager on <your computer name>, 
Scan for new hardware).  The modem should be automatically installed, or 
Windows may ask you for drivers.  If the latter, go through a normal sane 
hardware driver installation.

At this point, the fax driver might automatically be installed (Control 
Panel > Printers).  If not:

Go into Control Panel > Fax > 'Advanced' tab > Add a fax printer.

It should install correctly then.  If not, remove the modem again.

In Control Panel > Printers, add a random (I usually choose HP Laserjet 4) 
printer (no autodetect!) to LPT1.  Then try redetecting the modem and doing 
again what I previously suggested.

* - this depends on whether you configured the fax service in the Fax 
Service Management Console to receive faxes.

Modified: 30/10/2003, Mike Coppins.
Tested on: Win2k.
www.mikeymike.org.uk