1. I think it is a service trouble… some dependency, Virus Chest need anything more running. Maybe you can export your services list and post just the ones that are not running right now, when you try to open Virus Chest.

  2. Is the avast service running? (process called ashServ.exe)?

  3. Could you set the logging level to ‘Error’ in the avast settings, restart ‘avast! antivirus’ service (or restart computer), and try to use the Virus Chest… After that, run the avast Log Viewer to see the errors and post them here.

  4. See this forum is the error is the same as described there.

Please, keep reporting, we are happy to help you :wink: