I installed Norton Internet Security on 3 computers a week ago. After some glitches, two seem to finally be working properly (I shut them down for over a day in frustration & when I brought them back up- they were working fine again). I was replacing last years Norton Int Sec., bought a disc in a retail store, loaded it via external harddrive to an Acer w/ Windows Vista & it loaded fine & registered. When I open it & try to use it- I get the error message 8504,104 "Norton Service Framework has stopped working". I have deleted & reinstalled w/ disc twice, downloaded Norton Power eraser & run it & reinstalled twice, downloaded Norton Removal & Reinstall twice. I even tried downloading the Norton from my Norton account, since it had already been registered. Am I doing something wrong on install? Help!