Updating virus protection
The HOSTS file can be located in the following location windows\system32\drivers\etc\hosts assuming that your Windows directory is named Windows and not Winnt or something similar.Another possible location of your connection problem would be your Firewall (which you didn't mention having or not having) - check it to see that it is not set to deny the apps making connections for updates.
I don't really do that anymore, so I'll once again say that google is your friend.search for your HOSTS file and rename it with any extension (such as or even rename the file OLDHOSTS) as it is quite likely that this is all that is preventing your accessing the sites assuming you can access other sites on the web.
That's why you put all that stuff onto a CD earlier.
Then you can set about IMMEDIATELY downloading the latest security updates from Windows Update. After you've done all that, you can start loading on your usual assortment of programs.
Unfortunately, my pc was recently infected and it is bad.
After going through a few antivirus/spyware/malware programs, things have improved slightly, but there are still problems.