When exactly this error occurs (e.g., , installing , or updating ?) Your AutoCAD version (e.g., 2024, 2025?) Your Windows version ?
If the above steps do not resolve Internal Error 2602, try repairing or reinstalling AutoCAD.
: Ensure your .NET Framework is up to date and that you have installed the latest Autodesk Desktop Licensing Service.
Restart your computer after installation before attempting the AutoCAD update again. 3. Disable Security Software Temporarily