[FIX] KITKAT Security FC
First, you need ROOT access to do this. It will fix the security force-close and enable the uninstall of apps.
1 - Download FIXV2 here - http://d-h.st/gMh
2 - Extract the file to your desktop and copy the files inside "FIRMWARE\IMAGE" folder to your phone.
3 - Download root explorer from play store and move those files to the firmware\image directory located on your phone.
4 - Long press each file and set permition to RW-R-R (0644) (You do this by selecting OWNER to read and write, GROUP to read and OTHERS to read.
5 - Reboot and try accessing settings.
Thanks to ferreinf
for the link and how to do it, I just tried to do this as much newbie proof as possible.