It is a complex and tough task only suggested to advanced computer users. You can consider manually removing it manually. Follow the steps below:
Restart your computer and press F8 key constantly when the computer loads.
For Windows 7, Windows Vista and Windows XP
Restart your computer, immediately, quickly and repeatedly hit F8 key before the Windows start-up screen shows. Select “Safe Mode with Networking”, and then press Enter key.
For Windows 8
(1). Sign out to get the log-in screen