Open AutoCAD, type OPTIONS → go to Files tab → Support File Search Path . Remove any unknown paths (especially to C:\temp or C:\ProgramData\Roaming ).
Close AutoCAD. Open File Explorer and search your entire C: drive for Cd.vlx , *.vlx , and *.fas . Delete every instance you find, especially those in Documents and Desktop folders. Cd.vlx Download
Type APPLOAD → click Contents under Startup Suite. Remove any entry pointing to Cd.vlx , acad.lsp , or acad.fas . Open AutoCAD, type OPTIONS → go to Files