I have the same problem you are having. I posted in the support forum, and the reply I received recommended to not get a Winmodem. A good modem is a non-Winmodem. USR or Zoom modems are recommended. Also be sure that your ISP will support your new non-Winmodem if you decide to get a new one. You can read my post in the support section of this site, under "PCI modem problem."
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Phenom 9550 Quad Core
8GB Kingston HyperX
Seagate 320GB (boot)
WDC RE3 500GB x2 on Highpoint RocketRAID 3120 with RAID1