Hey
here are the minidump files for you:
http://www.megaupload.com/?d=OWQAU2SF
the dxdiag didnt turn anything up, and the device manager didn't show any flags..
i haven't installed any hardware, although about a month or two before the problem started we reformatted our computer and so I don't t know if all the drivers were reinstalled correctly..
we don't have another modem, and i dont think i'd know what to do if i did..
and thanks a lot! :)