What it likely means
To ensure stable performance, your hardware should meet or exceed these official Autodesk requirements :
Clean up geometry:
: Files found with ".epub" appended to an executable name are highly likely to be malware or adware . Genuine AutoCAD software is never distributed as an eBook format.
No official Autodesk file or installer has ever been named autocad_2016_english_win_64bit_dlmsfxexeepub.exe or similar. Authentic AutoCAD 2016 installers are typically named something like AutoCAD_2016_English_Win_64bit_dlm.sfx.exe —note the dots separating extensions, not the concatenation of “sfxexeepub.” The presence of “epub” makes this string highly suspicious and almost certainly fraudulent. autocad 2016 english win 64bit dlmsfxexeepub
As AutoCAD 2016 is an older version, direct public links are often removed. You can still access it through legitimate channels: Installation fails with downloaded AutoCad 2016
While AutoCAD 2016 didn’t natively open .epub , its included PDF underlay, DWF, and raster images. But a clever workaround existed: What it likely means To ensure stable performance,
: At least 6.0 GB of free space for the installation.