Autocad: Virtual Device Gdi16.hdi

Note: On modern Windows, even a healthy gdi16.hdi will often fail due to the 16-bit block. This method is a long shot.

Run AutoCAD as admin → REINIT → check Digitizer / PnP / HDI → OK. autocad virtual device gdi16.hdi

Windows or the GPU control panel is restricting AutoCAD's access to the card (common on laptops with integrated and dedicated GPUs). Note: On modern Windows, even a healthy gdi16

AutoCAD is trying to use a version of DirectX that your current hardware or operating system does not fully support. Note: On modern Windows

When AutoCAD is running on gdi16.hdi , the software uses your CPU to render graphics instead of the GPU. This leads to several performance issues: