Hi @945828615 ,
Can you open below location
C:\Users\<USERNAME>\AppData\Local\Autodesk\webdeploy\production\<ALPHANUMERIC>\FUSIONDOCSTREAM\Autodesk\FusionDocAcad\platforms
Share a screenshot of the files in it.
Basically there should be one file "qwindows_Ad_5.dll "
If there is another folder that has "qwindows_Ad_5.dll ", then deleting the folder should work.
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Sujay D'souza