The shutdown could have been done by accidental pressing, or by a system malfunction. One of the most common reasons why Avast anti-virus protection does not start is the disabling of one or more screens of the program. Let's figure out how to solve this problem. There are times when the application just won't start. However, there are also problems in her work. Avast user interface does not open What to do avast free antivirus IconĪvast is deservedly considered one of the best and most stable free antivirus software. Problems with launching Avast antivirus: reasons and solutions.