Although I didn't have any problem with that Windows update,
I uninstalled it as recommended by Microsoft.Later I restarted
Windows and problems with Avast appeared.In Update, message
was that last update attempt was 1.1.1970. at 1:00:00.Also that there
is new version available - 0.0.0.
Obviously that was stupid and I did clean install and so far everything
is fine with Avast version 8.0.1483.
This is just my experience which I hope will help someone.
Sorry about my English.