Susan,
I won't be around too often until monday, and I don't know if essexboy will.
So keep cool and keep looking this thread up every once in a while. If the trick in the post above helped to have hostsXpert run and fix your hosts file, then we are pretty far alright.
Anyway, in the meantime you can download the Avast AIS 6.0.1044 by clicking on the bold, blue "AIS" in my signature and run it. It's the newest pre-release version and very stable. (In your first post you wrote that you installed the Internet Security version, so I presume you have a licence for it - you have to pay for AIS)
Just in case you had installed the 30-day-trial version of AIS and have no licence, then download the "Free" from my sig, uninstall the current Avast version on your PC, reboot and install the downloaded "Free".
I'll be checking in here every now and then, as time permits, so keep me updated.
Have a wonderful weekendZyndstoff