This is because the Avast Store is unable to load and function correctly without these settings enabled. When you make a purchase via the Avast Store, you may be notified that you need to enable JavaScript and / or cookies in your web browser. Version 1909 results in this error.Enabling JavaScript and cookies in your web browser There seems to be absolutely zero information regarding this error message on a Windows 10 machine and anything recent.Īvast worked fine on version 1707.

Google is ignoring the 'Windows 10' in quotes Googling 'Avast This application failed to start because it's side by side configuration is incorrect' ONLY resulted in results that are a decade old and NONE of them are Windows 10.Īdding 'Windows 10' for 'Avast This application failed to start because it's side by side configuration is incorrect 'Windows 10'' (note the quotes) still resulted in results a decade old! To add insult to injury, none of the results include 'Windows 10' despite it being in quotes. It will not even do a repair install! I always get the following error message ' This application failed to start because it's side by side configuration is incorrect ' I updated Windows 10 from version 1707 to version 1909 and ever since, Avast Premium Security will not run.

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Avast error message -2147195904