The software was originally on two CDs. You can find the ISO files on Alfa Romeo owner forums (AlfaOwner, AlfaBB, or the subreddit r/AlfaRomeo). Search for Alfa_156_eLearn_v6.rar or 156_eLearn_ISO. Do not pay for it on eBay—it is abandonware, and the community distributes it freely.
eLearn was designed for Windows 98 / Windows 2000 / IE 6. It will crash or display black boxes on Windows 10 natively. alfa romeo 156 elearn
The solution: Use VirtualBox (free) or VMware. The software was originally on two CDs
Enter a DTC, like P0335 (Crankshaft Position Sensor circuit). eLearn lists: alfa romeo 156 elearn