A file size of roughly 106 KB is extremely small for a game update or a crack. It is most likely a text file ( .txt ) containing instructions, a list of serial keys, or a link to download the actual game files. In the context of pirated or "repack" games, these small text files are often included as "readme" files or setup guides.
If you encounter a file named forza_horizont_reg_code_106kb_upd.txt , you are likely dealing with one of three things: