Microsoft.Build.Utilites 2.0.0 was not able to reference the assembly Telerik.Sitefinity.OpenAccess

When running an older version of Sitefinity under Windows 10, the Telerik enhancer.exe requires the .NET Framework 3.5 to be installed.  By default Windows 10 does not come with the .NET Framework 3.5 so you will need to install it.  Windows 10 comes with the .NET Framework 4.6 installed by default.

Here is the error for future reference:
Microsoft.Build.Utilites 2.0.0 was not able to reference the assembly Telerik.Sitefinity.OpenAccess in \packages\Telerik.DataAccess.Fluent.2015.3.926.1\tools\enhancer\enhancer.exe

Resetting the Admin Password in Sitefinity

If you lost the admin password for a site you can reset the password for the admin user in the database.  This will set the password format to clear text with no salt for the encryption.

UPDATE sf_users
SET    passwd = 'password',
       salt = NULL,
       password_format = 0
WHERE  user_name = 'someadminuser'