Just after the installation of Avast Free Antivirus 17.1.2286 on Windows Vista Home Premium SP2, and the computer restart, Avast Free Virus is unable to run.
I receive a black screen with the error is: “UI Failed to load. This is really embarrasing. AV service is not responding.”
Before de update, Avast Free Antivirus was running percfectly every dayu.

Plase, any idea?