What is a GTA Vice City 'Unhandled Exception' error and why does it occur?

An 'Unhandled Exception' error in GTA Vice City signifies a critical error the game couldn't handle, often leading to crashes. Common causes include corrupted game files, outdated graphics drivers, incompatible hardware, Direct X issues, or conflicts with other software. It's a general error, so pinpointing the exact cause can be tricky.