I installed a 56k v90 winmodem and it works most the time. About every 10-15th time I turn on the computer it will detect a second winmodem and install drivers for it and then neither install will work I have to reboot and take out the second one to use the modem. I think part of this is I accidentally told windows that part of the sound card on motherboard that it detected were things like PCI bridge so they would not show up under unknown in the hardware manager. The sound works but I can't get windows to forget what I told it those devices were no matter what I do. Another thing might be that I have this computer and another conencted with a hub and 3com nics my network works ok but maybe windows thinks the network card is a second modem every now and then?