Internal Error 2602 Autocad |best| | Limited & Fresh

: If the error occurs during an update, redownload the update file directly from the Autodesk Account portal rather than using a network share.

Ensure your computer's graphics drivers are up-to-date, as outdated drivers can cause Internal Error 2602.

: This official tool from Microsoft is highly effective at fixing "Internal Error" codes that prevent software from updating properly. Advanced Solution: Re-register the Windows Installer

Autodesk's free viewer, DWG TrueView, has a more tolerant DWG engine.