It seems that you have StartupGuard installed, it is an utility.Startup Guard alerts you whenever a new program is set to start automatically with Windows. On initial run, it will prompt you for each existing entry, allowing you to keep it or remove it. After that, it runs in the system tray and whenever a new program is added to the startup, it will prompt you to allow it or not.
Try uninstalling StartupGuard.
Then download Spybot Search & Destroy, install it and run a check to detect possible spywares/malwares on your system.You can get it here.