I tell you my experience. 2 days back when my dad unknowingly
installed norton internet security and av into the comp, it was
like totally couldnt surf the net, and when try to change the
settings it tells me I need to log on and access denied and all
that sh+t, i was like WTF. Coudn;t even uninstall it. I had to
disable all its startup runs and manually delete it in safe mode.
knnccb. 
