Microsoft Clippy Becomes the Most Despised Software Feature in History
What happened
Microsoft's Clippy (Office Assistant) was introduced in Office 97 as a help assistant that would detect user intent and offer tips. Instead, it became famous for interrupting users at inopportune moments with unwanted suggestions. By 2001, Microsoft's own research showed most users found it irritating. Microsoft eventually disabled it by default in Office 2000 and removed it in Office 2007.[1]
What went wrong
Clippy appeared based on simple heuristics — for instance, detecting that the user had typed "Dear" and suggesting help writing a letter. The triggers were poorly calibrated and the animation interrupted focus without providing value. User testing apparently showed the issue but did not prevent the launch.[1]
Lesson learned
Proactive UI assistance must earn its interruptions. A help system that fires false positives more often than it genuinely helps will be disabled or mocked into cultural infamy. The bar for interrupting a user's flow must be very high, and the offered help must be clearly better than silence.