I just got the Security Shield virus and it is affecting my Mcafee fire wall. Does anyone know how to remove this virus??? I have an active McAee Antivirus Plus 20212 subscription of my laptop, but I a got the virus anyway. It appears that the virus has disable my firewall and I am unable to turn it back on. My O.O is windows 7Please help. Thanks.
Try accessing System Restore (Start > All Programs > Accessories > System Tools or simply type rstrui in the Start/Search box and then click it when it appears above), this can be done in either regular or Safe Mode if necessary. The latter is reached by tapping F8 repeatedly while booting up.
See if you can go back to before all this started.
Otherwise here is an excellent guide on removing this fake-anti-malware: http://www.bleepingcomputer.com/virus-removal/remove-security-shield