How to perform a clean uninstall of Civil 3D

Solution:

Use the following procedure to uninstall Civil 3D and remove any remnants from the system. Make sure to back up any customized Civil 3D files beforehand.

Uninstall the application from the Windows Control Panel

1. If Autodesk Desktop Connector is installed, right-click the system tray and select Exit.
2. Go to Control Panel\All Control Panel Items\Programs and Features.

• Uninstall application updates first. On the left pane, click View Installed Updates.
• Uninstall any AutoCAD, AutoCAD Map 3D, and Civil 3D updates.
• On the left pane, click Uninstall a Program to return back to the program list.

3. Uninstall all Autodesk Civil 3D-related components, extensions, and add-ons for the affected version. This includes but is not limited, to:

• Autodesk Civil 3D Country Kit.
• Autodesk Civil 3D Object Enabler.
• Autodesk Subassembly Composer.
• Autodesk Project Explorer for Civil 3D.
• Autodesk Grading Optimization for Civil 3D.
• Autodesk Storm and Sanitary Analysis, see Clean uninstall of NovaPDF for SSA.
• Any Autodesk Civil 3D extension such as:
  • Geotechnical Modeler Extension.
  • SHP Import/Export Utility.
• Any AutoCAD based application, such as:
  • Autodesk Vehicle Tracking.
  • Autodesk AutoCAD Raster Design.
• Any third-party Civil 3D add-on or plugin.

4. Lastly, select the Autodesk Civil 3D version. 
5. Click Uninstall and follow the uninstall wizard, note If the uninstall process fails, refer to: Uninstall using the Microsoft Installation Troubleshooter.
6. Restart the computer.

Delete any remaining folders and registry keys

1. Log on to the computer as a member of the Local Administrators group.
2. On the Windows Start menu, click Run.
3. In the Run dialog box, enter Regedit.
4. In the Registry Editor, browse to the registry key that corresponds to the affected software version. Refer to the table below.
5. Delete the corresponding registry keys.
6. ​Close the Registry Editor.
7. Using Windows Explorer, navigate to the user's application folders that correspond to the affected software version. Refer to the table below for the default folders - If the installation is based in a drive different than C:\, adjust paths accordingly.
8. Delete the corresponding folders.  

Note: Deleting the C:\Program Files\Autodesk\AutoCAD 20xx folder in table below is necessary for a clean uninstall of Civil 3D. However, it will affect vanilla AutoCAD or other AutoCAD-based installations, like AutoCAD Map 3D or AutoCAD MEP. If any of those are installed in the same machine, they need to be uninstalled and reinstalled as well.
   
Note: The last three numbers in the registry key refer to the product language installed and may vary from the one specified in the table (409 is the language code for English international).
For other language codes, refer to: List of Local Language Code for Autodesk Products.

Warning:
Use the Microsoft® Registry Editor only at your own risk and only after backing up the registry as well as the  system.dat and  user.dat files as outlined for your operating system in the Microsoft Knowledge Base and in the related solution,  Back up system registry. Additional information about the registry is also contained in the Help topics in the Microsoft Registry Editor.

Problems caused by improperly editing the Windows registry could render your computer operating system unusable. Microsoft provides a wealth of critical information that you need to know about the registry in the Microsoft Knowledge Base at  http://support.microsoft.com/.

 

Before reinstalling Autodesk Civil 3D

1. In Windows Explorer, delete the contents of your Windows Temp folder, but do not delete the Windows Temp folder itself. Enter %TEMP% in the Address bar of Windows Explorer to locate the Temp folder.
2. Use the End Task feature from Task Manager to end any anti-virus programs. 

The system is ready to reinstall

Restart the machine and reinstall Autodesk Civil 3D on the machine.