The system does not detect mscoree.dll – how to download and fix the error

When running some games and programs on Windows 11 and Windows 10, you may get the error message “Code execution cannot proceed because the system did not detect MSCOREE.DLL. To fix this problem, try reinstalling the program." Hence the frequently asked questions about where and how to download mscoree.dll

This manual details what this file is, why you probably shouldn't download it to fix the error, and how to download mscoree.dll if you need to.

How to install or download mscoree.dll for Windows 11 and Windows 10

The mscoree.dll file is one of the DLLs included in version 4 of the Microsoft .NET Framework and is already present in Windows 11 and Windows 10 by default, although it is not always installed.

Hence the first action to take when the error “The system did not detect mscoree.dll” occurs:

  1. Open control panel (you can use taskbar search to do this) and go to “Programs and components”. You can also press the keys Win + R and enter appwiz.cpl
  2. In the left pane, click on “Turn Windows components on or off”.
  3. Enable the .NET Framework components and click "OK". Enabling the .NET Framework 4.8 Advanced Services and WCF Services components is usually sufficient to fix the error in question, but you can also enable anything related to the .NET Framework.
  4. The components, including the mscoree.dll file, will be installed automatically; you may have to restart your computer.

This will result in two different sizes of mscoree.dll files on the system – one in C:\Windows\System32 (64-bit, despite 32 in the folder name), the other in C:\Windows\SysWOW64 (32-bit). bits here).

If for some reason you need this file as a standalone DLL, you should also not download it from third party sites. You can find it in the component repository folder C:\Windows\WinSxS in subfolders starting with:

  • amd64_netfx-mscoree_dll – the x64 version of mscoree.dll is located here
  • x86_netfx_mscoree_dll – the 32-bit version of mscoree.dll is stored here

If by all indications the file should be present but isn't, try repairing the component repository, checking and repairing the integrity of Windows system files, and using the .NET Framework Repair Tool https:// aka.ms/DotnetRepairTool

If for some reason the installation of the required .NET Framework components and the included mscoree.dll file fails, try using the standalone installer available on the Microsoft website here: https://go.microsoft.com/fwlink/? linkid=2088631