Windows Vista (2007)

Windows Vista launched with crippling UAC prompts that interrupted users every 15 minutes and driver incompatibilities affecting 40% of hardware, making most PCs unable to run it efficiently. This led to mass downgrades to XP, a fate worse than the average operating system upgrade. When compared to Cyberpunk 2077's console disaster, Vista's failure was more pervasive, affecting millions of enterprise users globally and costing Microsoft an estimated $10 billion in lost support.