Achieving a widescreen fix for Heroes 5 might involve a bit of trial and error. Start with the simplest solutions, like checking for official patches, and then move on to community-developed fixes or software solutions. Always ensure you're downloading files from trusted sources to protect your computer from potential threats.

[Scaling] ScaleUI = 1 UIScale = 1.0 ; keep at 1.0 unless UI is too small

Start the game, select your desired widescreen resolution (e.g., ), and enter a map.