Avast and PowerPoint

Every time I open PowerPoint, a window with the following message appears: “C:\Program Files\Avast Software\Avast\aswhook.dll is either not designed to run on Windows or it contains an error. Try installing the program again using the original installation media or contact your system administrator or the software vendor for support. Error status 0xc0000428.” This does not appear with any other Office application, including Word and Excel. I removed the free version of Avast from my computer, restarted it, then downloaded and installed Avast Free again. Nothing changed. That message window still pops up on PowerPoint.

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Having the same error trying to run DISM in Powershell.