The first step is to disable the Avast service. This can be done by right-clicking the Avast icon and choosing "disable". Then, you can disable the Shields control and reboot your computer with default settings. If these steps fail, then restart your computer in safe mode. In case the above solutions did not solve the problem, you can run the command as administrator and repair the Avast software.
In addition to the above steps, there are a few more options to fix the problem of Avast won't open on Windows 10. One of them is to restart the computer. If you are unable to start the computer, you should perform a clean installation. Afterwards, Avast should now open properly. It is important to follow the installation process carefully to avoid corruption. It should be installed properly on your computer. If the error persists, contact Avast support to obtain the solution.