Verifying that the correct version of Microsoft .NET Framework is installed

For information about the required versions of Microsoft .NET Framework, see the System requirements. If a required version of .NET Framework is not installed, install it.

Note: If you have a version of .NET Framework prior to the required version for this release, you do not need to uninstall it before installing the required version.

To find .NET Framework versions by viewing the registry:
1. Select Start, enter regedit.exe, and press Enter.
2. In the Registry Editor, go to HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\NET Framework Setup\NDP.
  The installed versions are listed under the NDP subkey.
If .NET Framework is installed, the folder contains folders whose names begin with v, followed by the .NET Framework version number. For example:
- v3.5—indicates that .NET Framework 3.5 SP1 is installed.
- v4.0—indicates that .NET Framework 4.0 is installed.
To find .NET Framework versions by using Windows Explorer, paste the following text into the Windows Explorer address bar: %systemroot%\Microsoft.NET\Framework64.
If .NET Framework is installed, the folder contains folders listing the installed versions.