I have updated my system from Windows 8 32 bit to 64 bit.Now my eclipse is not detecting the my device that karbon A27+ .I have tried every thing and searched on stack overflow but nothing helped me .When i am running this command adb devices It is not showing my device.What could be the problem .
I have tried this
If you on Windows 8, you may have to Disable Driver Signing before that:
Move your mouse pointer to the upper right-hand side of your monitor. This will open the charm bar. Click the Settings charm. Click the Change PC settings link at the bottom of the Settings menu.
On the devices option it is showing that no driver available on the Karbon A27+
Just install 64-Bit USB drivers of your phone or try out with this URL.
Check URL for detailed description.