I have a friend who is having problems with his modem. Basically it seems to be some kind of port conflict on the Pc. The error message "Failed to call EnumPropPages in modemui.dll" appears together with "Cannot read port name from registry". I removed the modem at the control panel and on restart plug and play worked fine and it installed without any problems. But if I try to click on the properties of the modem it doesn't respond and even though the modem appears correctly installed in the device manager the com ports are unused. I went to manually configure the IRQ but it gave me a warning about future plug and play installation conflicts. If I delete the modem registry keys will that solve it?