www.:0.com problem

I keep getting 'Looking up :0...' at the bottom left of my firefox window whenever im trying to access some sites, can't seem to figure out what's the problem. Windows restore can't fix it, nor reinstalling firefox, uninstalling internet explorer 7.. All this happened after installing internet explorer 7 btw.

Now whenever i try to access some websites such as www.yahoo.com, i get

:0.comactionpage?basictype=block&epochseconds=116543369
8&requestedurl=http%3A%2F%2Fwww.yahoo.com%2F&categorylist=&catego
rydescriptionlist=Block%20All%20Policy&useripaddress=XXX&user
name=&actiontaken=block-all&actionreason=by-blockall-policy&actionreason
data=&replayhash=AKXnh0YmhMy7h8tJG2ymzQ%3D%3D

Firefox can't find the server at .:0.com.

Also tried running new/previous versions of internet explorer, but nothing works

Cannot access a lot of regular sites, gah, this is frustrating! Anyone pls help.

 

Just found out it's the problem from my isp, not any fault with my end =) phew