The .NET framework is a necessity for us computer users and a lot of programs require that you have it installed. Since, .NET framework installs so many files into your computer and it modifies tons of registry settings, an interruption in the install of it can cause many problems. I will show you how to fix the .NET 4.5 not detected error that AutoCAD spits out during an installation. Remember, you will not have to install .NET 4.5 if you are using Windows 8.1 or Windows 10 which has the .NET Framework 4.5 already built-in.
If you have either Windows 8 or Windows 10, you can just start the AutoCAD installation normally. The “.NET Framework is not installed AutoCAD error” normally occurs while installing AutoCAD on computers that has the 4.6 .NET upgrade installed or if you have a Windows version prior to Windows 8. If you have any version of Windows prior to Windows 8, you can download and install the .NET Framework 4.5 version here.
I tend to make the mistake of installing .NET Framework 4.6 on Windows 8 and Windows 10 computers along with a NiteNite installation. This was the reason why I recently ran into a problem with the .NET framework not being detected during an AutoCAD 2016 installation. This wasn’t a Microsoft .NET framework problem but an AutoCAD setup problem. I was able to fix the .Net not detected AutoCAD error after much research. This issue took a lot of time to solve because I had .NET 4.6 installed and I was trying to remove it thinking it was corrupted. But the tricky part was, I couldn’t downgrade the software as I already had the latest version installed and I saw no options to remove it from the programs list. Apparently, I came to find out that AutoCAD 2015 or 2016 will spit out this error if it doesn’t see version 4.5 of the .NET framework installed during setup and registry checks.
Fixing .Net 4.5 Not Detected AutoCAD Error
Thankfully, this is one of the easiest fixes I’ve done with .NET framework. It turns out that all you have to do is edit the following registry setting. Launch the the registry editor by going into Start Menu > Run and type in“regedit” then navigate to the following key location.
HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP\v4\Client
Edit the version regedit key to the right and change the version number from 4.6 to 4.5. If your computer spits out a message saying that you don’t have permissions to edit the registry key then you will want to take ownership to do so. Select the “version” key that you want to edit then go to edit > permissions > advanced > Owner and select your username from the list, hit apply and OK.
Afterwards, you an re-launch the AutoCAD installation and it will continue normally as you can see below.
I hope this post provided you with some insight into solving your AutoCAD installation problems regarding .NET framework. If you have any questions or if you are still having trouble installing AutoCAD, please post below and let us know.
I followed the steps to change the registy version setting to 4.5 but still get the same error when attempting to re-launch the installation of Service Pack 2 for AutoCAD Lt 2015 on a machine running Windows 7. Has anyone else run into this issue or have any suggestions for other options I can try?
I followed this all step but in advanced select username from the list, Hit Apply and OK… After I hit the message is coming. his say “this will replace explicitly defined permissions on all descendants of this object with Inheritable permission from client “