Microsoft Download Center Microsoft .NET Framework 4.7 (Offline Installer)
The Microsoft .NET Framework 4.7 is a highly compatible, in-place update to the Microsoft .NET Framework 4, 4.5, 4.5.1, 4.5.2, 4.6, 4.6.1, and 4.6.2. The offline package can be used in situations where the web installer cannot be used due to lack of internet connectivity.
For those of you who are placing the ClassicUO folder inside of your shard's UO directory with all its files, you could also do this...
That will basically mean that it will go to one folder level up and find the files there.. Better imo to do that if yall you ever do is plan to drag/drop the ClassicUO folder in any shard that you play. So it will always work and you never have to change the filepath again (assuming you put it in a folder inside your UO shard you play)