Default System apps reinstall after reboot after uninstalling them

I have an HTC desire 500 with full root ! Now I want to uninstall some of my system apps like HTC car, Google playbooks etc. I've tried root uninstaller, es file manager, titanium backup recovery exploit and every possible app on the market . Now when I uninstall any of the system app they tend to reinstall after a reboot. Can some plsss help for the issue !!

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