: Resolution of specific mission-breaking bugs and world glitches.
: This indicates that the update has been split into multiple smaller pieces (volumes) to make uploading and downloading easier. You cannot extract the update with only "part 1"; you need all subsequent parts (part2, part3, etc.) in the same folder. What’s New in Update v1.17? Watch.Dogs.2.MULTi16.Update.v1.17.part1.rar
: Run a virus scan on the extracted files before execution. : Resolution of specific mission-breaking bugs and world
: This is the specific version of the patch. Version 1.17 was one of the later stability and content updates for the game. you need all subsequent parts (part2