Hello . I have a problem with my pc not being able to install usb drivers for my phone (samsung gt-7580). I tried almost everything I could find on internet. Tried uninstalling and installing driver, tried downloading manualy drivers, tried programs like drivereasy. In device manager I have exclamation mark on CDC serial, and on my phone driver, tried updating cdc online and browsing my computer, but doesnt find a thing, but when I tried updating my phone driver, it ether says : "Windows found driver software for your device but encountered an error while attempting to install it." or it starts installing driver but my win 7 end up crashing . please help me .. this is starting to be incredibly annoying...