Avoid SECURITY SHIELD. Warning…
Do NOT Accept any service offered by Security Shield
Security Shield appears to be a VERY AGGRESSIVE malware that sneaks into your computer and appears to scan your system where it finds several (other) malware programs that it warns you need immediate removal -AND- naturally Security Shield offers to remove for you. Do NOT accept it!
Be sure you have a reputable AntiVirus program. Keep it upto date, either by frequent manual updates or (preferrably) enabling automatic updates. Upgrade to the most complete version that you can technically and financially handle.
My home system was attacked this morning. My Norton Internet Security program did not block the initial attack but shortly afterwards appears to have removed it.
If possible do an online search for Security Shield. If necessary seek Professional Help.