Last week, one of our tech support geniuses (thanks Deni) solved a problem for me. I wanted to be able to reset the classroom computers back to a factory install for Civil 3D 2011 and 2012. Well, it turns out to be simpler than I thought it would be. All you have to do is delete a folder in Windows Explorer and delete a folder out of your registry.

IF YOU MESS WITH YOUR REGISTRY AND IT BLOWS UP DON’T BLAME ME BECAUSE RIGHT NOW I’M TELLING YOU TO MAKE A BACKUP OF YOUR REGISTRY BEFORE YOU DO ANYTHING LIKE THIS AND YOU SHOULD NEVER TRUST SOMEONE ON THE INTERNET TELLING YOU TO MODIFY YOUR REGISTRY WITHOUT TAKING THE APPROPRIATE PRECAUTIONS LIKE BACKING UP YOUR REGISTRY!

Now that I have that out of the way, simply do this. Go into Windows Explorer and delete the folder the corresponds to the version of Civil 3D you want to reset (this works for other verticals as well as regular AutoCAD as well but make sure you get the right stuff for those other programs) from “C:\Users\<username>\AppData\Roaming\Autodesk” (replace <username> with your login name on your computer). In this case, since I’m trying to reset Civil 3D 2011 and Civil 3D 2012, I’ll delete those two folder. NOTE: This location is for Windows 7. I’m not sure what the path is for other operating systems but since you are running C3D, you are running Windows 7, right? If not, you should be.

Now, you just need to make a slight modification to your registry (see my disclaimer above). Hit your Windows Key on your keyboard and type “regedit” and hit enter. This will bring up your registry editor. Now simply browse down through it till you find “HKEY_CURRENT_USER\Software\Autodesk\AutoCAD\” This is where all your AutoCAD based Autodesk software is stored (at least the part of it we are concerned with). The versions I wanted to reset were 2011 and 2012 so, 2011 is found in the R18.1 folder and 2012 is found in the R18.2 folder. Now, for Civil 3D 2011, delete the R18.1\ACAD-9000:409 key and for 2012, delete R18.2\ACAD-A000:409.

Once you are done with that, simply restart C3D and the Secondary Installer will run and you will get a nice freshly installed C3D on your system.

If you are leary about editing your registry, check out http://seilercadsupport.wordpress.com/2011/07/30/i-want-a-do-over/ for instructions on resetting C3D without the registry edits. (I have to give credit where credit is due, that post from the Seiler CAD Support Blog was the inspiration for this post.)