I am also having the exact same problem with the CF Card showing up in the system. It does show up during the boot process, but does not show up after Windows 7 64 bit loads. Nothing shows up in Disk Manager or in the Device Manager. I do not have a Kingston CF Card so I don't know if it would show. I have a Sandisk Extreme 60gb/sec card, and it does not show. Addonics has given me a RMA also, but if that was no help I will probably go with a return until they manage to straighten out the problem. It is a pity as I certainly could use the download speed.