Please follow the below steps to download security center ;
Check and delete if you have any other security software in add/remove programs or its file and folders in C:/program files and common files.
Run the preinstall tool from http://download.mcafee.com/products/licensed/cust_support_patches/McPreInstall.e xe
Save the DM setup on desktop and right click on it and click on run as administrator
Kindly report back if you have any issues on the same.