My modem is a USR Hardware PCI Internal one. I initially tried using the drivers with Win2K. I then removed it (not physically) and tried the latest drivers from USR. The modem is recognized but when I do Query Modem the following message appears: "The modem failed to respond. Make sure it is properly connected and turned on [it is]. If it is an internal modem or is connected verify that the interrupt for the port is properly set [I have also confirmed this]". I have tried rebooting each time letting Windows 2000 recognize it but I can only do this manually in Control Panel. As to physically removing the modem, not at this point. For this last part to work should I: shut down, physically remove the modem as you suggest, boot-up without the modem, shut down again, install the modem and finally reboot? The read me files don't say much of anything and since this modem is OEM I never received any installation instructions. It works because I am currently using it on a dual boot system (Win 98 SE & Win 2000). But for some reason when I boot with W2K I have the aforementioned problem.