I was running AVG and it didn't help. I ran other AV programs and no help.
Finally, I did a system restore to the previous day, before the infection. It worked perfectly. All has been well since then. I did immediately run a AV scan using the latest definitions.
I'm pretty sure this was the topic of last week's emergency update it Internet Explorer. Lots of legitimate websites have been hijacked because they didn't update their software. Most are running Wordpress on Linux boxes. It's a Wordpress problem rather than a Linux problem, but it demonstrates that the OS cannot protect you from everything.
System Restore can fix things if it hasn’t been disabled. In my brief experience with the new malware, System Restore has been disabled. I posted my preventive backup method. I’ve tried it twice and it works. It takes about five minutes.