Norton Internet Security 2011 Blue Screen of Death on install

So yeah guys i had a symefa.sys driver corruption which made me not load up even windows 7, but i got that fixed and uninstalled nis 2011, now when i go back to installing it, it has a bsod when it tries to install/start services.

i have even tried uninstalling threatfire, but it still has the problem.

please help, will soon report on the exact problem perhaps with a pic.