Cannot Browse with ANY BROWSER

I use windows 7 x64. I have been using this Safety Minder for a while now (over 6 months atleast) and previously I could brose with no problem (of course the sites needed to be blocked were blocked). However, 2 days back, I have developed this peculiar problem. I can’t goto any website. When I do disable the Norton Safety Minder, I can browse with ease. Is this a known issue? (I tried with nealy all the browsers there is, Opera, Chrome, Firefox, IE x32 and IE x64). Can this be fixed?