Check the or Virus Vault section for any file named acadres.dll or anything related to Autodesk.
Finding a "Problem loading acadres.dll resource file" error when launching AutoCAD 2021 can be frustrating, essentially preventing the application from starting. This error generally indicates that AutoCAD cannot find, load, or utilize a critical resource file necessary for its user interface and functionality. problem loading acadresdll resource file autocad 2021