How to fix if Avast Antivirus Won't Open After Avast Antivirus Update.

If you want to know avast does not open fix you can follow the step given below:

1. Open Avast User Interface > Settings > Troubleshooting, and remove tick mark for ‘Enable Avast self-defense module’ and click ‘OK’.

2. Now open the Task Manager, and kill the instup.exe process if running, if it’s not running, go to step 4.

3. Immediately a pop up appears and informs to update virus definitions as last attempt was unsuccessful, ignore it, now uninstall Avast, it will, without any issues.

4. You can uninstall Avast, you won’t get that error.

Hopefully above steps will help you to fix the issue if not you can also follow our blog to see more on avast antivirus will not open.