2.0 is backwards compatible and if connected with a 1.1 cable will run at 1.1 speed. With Sony cameras, the software must be installed so the proper drivers for the camera get loaded. After the software has been installed, go to the Sony website and download the latest drivers and newest software/firmware updates for your model camera and version of Windows that you are running and install them. Make sure your firewall and anti-virus apps are disabled while installing all of this. After that, make sure the USB ports are enabled in the BIOS and that there are NO yellow or red marks showing in Device Manager next to the newly installed devices. We actually recommend to install and use a firewire card as they are more dependable and faster than USB (including the new 2.0). Your choice. If available, use the AC adapter when working with the camera to save battery power. Plug in the cable into the camera, then plug into the computer. If it isn't recognized, restart the computer leaving the camera plugged in BUT turned off. Make sure camera is turned on to the proper setting for the task you are attempting to do. After the initial installation of the Sony software, you can install and use whatever video/etc. software you want to use. Just don't lose the Sony disc.