Hello. I am not sure about writing to this place, but I try. My STF 8300m connected to my laptop by "active" USB cable 5m. All other stuff (mount, focuser, guiding camera etc.) connected to D-Link USB Hub (7 ports) and then connected to another usb port of my laptop by the same active USB cable 5m. I use this configuration some years without any problems. But after some months without clear sky, some days ago I turned on all hardware, connected as usual to laptop and ooops - Windows 7 64 couldn't recognize cable with 8300. Another stuff is ok. I changed my active cables, but result the same - camera did not recognize. I said "bad news" and tried connect camera without active 5m USB cable, but just 3m usb "passive" cable . Ooops - works fine. I installed camera's driver to my desktop PC and tried connection with active 5m cable. Works fine!!! (Windows 7 64 too) So, I have good camera, 2 good 5m active cables, good laptop's usb ports, everything works fine, but I can't connect my camera by 5m active cable, what absolutely I need! And it was ok 3-4 years! Please, any advises? P.S. I tried to remove and reinstall SBIG 64-Bit Driver Checker. I wrote last firmware to my camera. Nothing changed.