I am using Windows XP SP2 and Symantec Norton Internet Security 2007.
For a couple of months I have been unable to access the symantec.com website (so cannot update virus definitions other than manually by using my laptop) or the microsoft.com website (so cannot download updates for microsoft products). I get the standard 'Internet Explorer cannot display the webpage' page.
I suspected a virus, but all virus checks have been negative.
The hosts file at C:\WINDOWS\SYSTEM32\DRIVERS\ETC appears to be fine, containing only '127.0.0.1 localhost'.
Any helop would be much appreciated as frustration levels are rising!