Download again the trial version of the software and install it over your current one. The installation process will replace all Quick Heal Total Security files that are missing or corrupted and will repair the software. If you want to uninstall the program, but you can't do it using the normal procedure, I suggest you use Revo Uninstaller. Even if it can't uninstall the application normally, it will force it to uninstall by wiping out all traces of its presence from the system.
After that, try running AdwCleaner to make sure that there are no leftover rogue registry keys or toolbars in your system.