I was facing one strange issue that running adb start-server was doing nothing.
Looked at multiple blogs but got confused finally found the solution.
I had a JDeveloper instance running. So closed it. Also stopped Java from Task Manager.
Then downloaded ADB Drivers from http://www.adbdriver.com and installed. While installation it showed that “My XOLO phone has not installed proper driver” and corrected.
After that I ran,
it started running as below,
it shows my phone attached to it.