Sometimes Android USB devices won’t connect to a Windows system. For attempts at connecting via the Android Debug Bridge (ADB), bad Android USB drivers that load in place of the right ones often cause the issue — and users can’t uninstall these drivers using conventional means. Removing the offending drivers and installing “universal” ADB drivers should fix this problem. If you can’t connect an Android device to your computer — and you’ve already enabled “USB Debugging” (what’s USB debugging?), then is the method for you. When turned on, USB debugging allows users direct access to the file system of an Android device from a PC
Source fromhttp://www.techtips.biz
