Websteroids is considered a bad application by many users, it takes over your browser, Internet connection and displays annoying ads all over your computer. First attempt to remove it is through the Control Panel, but it you fail to do it, 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.
After this operation, obtain a copy of Combofix and run it. While scanning the application will turn off Internet connection to prevent additional downloads and it will restart the computer. When it finishes, Websteroids should be removed.