At least I can help at least one person in this thread
the virus found in:
c:\windows\system32\drivers\etc\hosts
is most likely the reason why you cannot access those websites, the hosts file can be used to change where urls point to.
find:
c:\windows\system32\drivers\etc\hosts
and edit it to so
only the following is in it:
127.0.0.1 localhost
the lines that start with an '#' are actually comments, so they are not important, you don't need to delete those lines.
Hope this helps a little bit
Edit: i'm guessing that AGOBOT (aka GAOBOT) will just change the hosts file back, but it's a temporary solution.
