When you try to open a game on steam and it starts to "update" but turns out there ain't no update, this should fix it.
- Try removing your external HDD/SSD first, it might be a Steamworks Redist Update
- Create Config.txt (case-sensitive) in the same place as the exe.
- Create a Config.txt with the first line being the path to steamapps e.g: D:\Program Files (x86)\Steam\steamapps
- Launch the program
- Enter the app id of the updating game/software.
- It should hopefully fix it!