There is a Bsecure tool you can download and use to remove the application from your computer. You can download it from the AVG website. Since it's an automated tool, simply download it and launch it from the desktop then let it do its job.
If you still have problems, install Combofix and reboot the computer to Safe Mode (reboot > post boot > press F8). Disconnect the Internet cable and run it. At the end of the operation Bsecure will be removed from your computer.