Installing Civil3d 2006 on Windows 10, Windows 7, Windows 8 or Windows 8.1 32bit or 64bit can be very easily defined in these short steps…

IMPORTANT NOTE: Autodesk no longer supply License Activation codes for this version of AutoCAD. The best way is to transfer your existing license to the new PC but there are other options, we document them here

1. Obtain your copy of the Longbow Converter here
2. Using Windows Explorer, copy your entire Civil3d 2006 CD to your hard drive, to a folder path c:\Autodesk\civil3d2006 
3. Start the Longbow Converter tool, select the 2nd tab, pick the c:\Autodesk\civil3d2006 folder, and click Run. Read and understand all the prompts before pressing OK. Once the setup starts, stop and read the next step…
4. In the setup program, navigate through each setup dialog as normal, except when you get to the installation folder, **it’s vitally important to make sure you install to c:\civil3d2006 (not Program Files (x86)\AutoCAD Civil3d 2006 as usually prompted by default)**
5. Once installed, go back to the Converter tool, select the 3rd tab, pick the newly installed c:\civil3d2006 folder and click Fix.
6. Now you can happily run your Civil3d 2006 on Windows 10, Windows 7 and Windows 8.

Installing the Civil3d 2006 Service Pack 2