The biggest antivirus software can also face the issue of avast won't open in windows 10. This issue can be due to the compatibility issues of your PC. You can resolve this issue by using Wmi respiratory. Also, you can repair avast using the control panel. Check for the updation of Avast antivirus and windows 10.
For more information: https://worldzo.net/avast-wont-open-on-windows-10
For more information: https://worldzo.net/avast-wont-open-on-windows-10