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If none of these solutions work, the installation files themselves may be corrupted. In this case, perform a using the Autodesk Uninstall Tool and reinstall AutoCAD fresh.
: Installing from a network share where a patch (like AutoCAD 2019 Update 1.2) has been added can cause the installer to fail when looking for "Additional Files". internal error 2602 autocad
If none of the above works and you see (even new ones), it’s likely a core product defect. Provide: If none of these solutions work, the installation
AutoCAD’s installer creates temporary folders and modifies registry keys—behavior that some Antivirus programs flag as "suspicious." Temporarily disable your Antivirus and Windows Defender. Lower your User Account Control (UAC) settings to "Never Notify" during the installation process. If none of these solutions work