You can try to remove "my security shield" manually. Manual removal instructions could be found at http://www.pcrisk.com/internet-thre... but manual removal requires good computer knowledge. To automatically remove my security shield try downloading malwarebytes antimalware. Download links http://www.pcrisk.com/top-spyware-r... Download, install and update. If you are not able to install malwarebytes antimalware rename mbam-setup.exe to something.exe (or anything different) and run it. After you have installed the software try to launch it. If nothing happens. ( Program doesn't start) Go to the folder "C:\Program Files\Malwarebytes' Anti-Malware" and create a copy of the "mbam.exe" file and rename it to "start.exe" and run it. After this procedure your software should run OK.
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