Windows will detect an "Unknown PCI Device."
If you are on Windows XP, you will get a warning saying the driver has not passed Windows Logo testing. Click "Continue Anyway." Zoltrix never paid Microsoft for certification, but the driver works. Zoltrix Z919 Modem Driver Downlo
If you simply search "Zoltrix Z919 Modem Driver Download" and click the first sponsored link, you will likely end up with a virus. Sites like drivers-collection[dot]com or driver-solution[dot]net are notorious for bundling adware. Remember: Windows will detect an "Unknown PCI Device