Security shield rouge is a very difficult spyware to not only detect but also remove. You can try to use your PC and the usual way of uninstalling a given program. The problem with Security Shield is that it can reinstall itself after it has been deleted. Not only will it come back but it usually brings other spyware along with it as well. When you will delete such programs from your system: you can damage some important files part of your system. Like the DLL files, or the Registry keys. The best method to get rid of such very bad spyware is to look for a quite recommended malware remover to delete Security shield, and any other malware, Trojans, or viruses that might have compromised your PC. Here Security Shield Removal you will read more about Security Shield.
There are lots of ways your PC can get infected by Security Shield. It can come disguised in downloaded software or any shareware you may have. This tool will attach itself to such applications. This is how this virus will compromise your PC system and will stay there. Another way you can be tricked and be infected by this malware is through some deceptive pop up ads that will look like some regular alerts. No matter if you do push "yes" or "no", the malware will still install itself on your PC. So it will even be more difficult to really know if you have been affected, or not. Check here Remove Security Shield Windows 7 to know more about how to remove Security Shield for Windows 7.
The moment you do believe your PC has been compromised by security shield, think about investing into some kind of malware remover. You should find ways to protect your computer system from being compromised. Lots of malware removers will have advices and tips on the best methods to protect your system from infections. Do not panic if your system became compromised. Even if those viruses can be dangerous and bad for your PC system, there is always a way to remove them. The best option being caution when downloading software to make sure your not downloading more than you bargained for. Also, avoid any kind of popups. These are usually the biggest trouble makers since you don't even know if you downloaded a virus even if you didn't download anything. Learn more about Security Shield and be sure your computer is not infected with it. If it is: do all the steps required in order to delete this problem from your system as soon as possible.