If you are trying to open a DWG file with AutoCAD and you get the message “Drawing File was created by an incompatible version” it’s because somewhere along the line your AutoCAD DWG files were saved with a newer version of AutoCAD.
Using Windows Explorer, copy Disk 1 of your AutoCAD 2017 install media to your hard drive, to a folder path c:\Autodesk\AutoCAD2017
If you have more CD’s, copy them all directly over the top of Disk 1, overwrite all files in your previously copied c:\Autodesk\AutoCAD2017 folder
If you have a single self extracting exe downloaded from Autodesk called something like AutoCAD_2017_English_Win_32_64bit_en-us_Setup.exe
Simply run the exe, it will ask to unzip to a folder inside of c:\Autodesk, make a note of the folder for later use (we’ll refer to it from here as c:\Autodesk\AutoCAD2017), now click OK. Wait until all of the files have extracted, when they do, the AutoCAD 2017 setup will automatically launch – simply close it and move to the next step.
Now, start the Longbow Converter tool, select the 1st tab, pick the c:\Autodesk\AutoCAD2017 folder, and click the Convert button.
Once the conversion process is complete, click Install/Run Setup to start setup. Simply install as normal.