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Damage to the Windows Management Instrumentation (WMI) can prevent AutoCAD from "seeing" your hardware. How to Fix gdi16.hdi and Restore Performance
These are "Heidi Device Interface" drivers that act as a bridge between AutoCAD’s software and your computer's display hardware. autocad virtual device gdi16.hdi
If you are using AutoCAD 2023 or newer and your GPU is struggling, forcing a downgrade to DirectX 11 often fixes the gdi16.hdi error. Damage to the Windows Management Instrumentation (WMI) can