Please follow the instructions at https://www.avast.com/faq.php?article=AVKB33 to send us diagnostic information from a device/workstation you are experiencing issues with.
In the “Details of your issue (optional)” box, please also provide your Avast case/ticket number, if applicable.
When you contact us, please provide the File ID.
Location of Avast log files:
Windows XP; Server 2003 - C:\Documents and Settings\All Users\Application Data\AVAST Software\Avast\log
Windows Vista/7/8/10; Server 2008/2012/2016 - C:\ProgramData\AVAST Software\Avast\log
This information will allow us to analyze the situation and provide you with a solution. We will analyze the data and contact you with further information.