I too am having this issue on Server 2012 R2. I installed - Security and Quality Rollup updates for .NET Framework 3.5, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, and 4.7.2 for Windows 8.1, RT 8.1 and Server 2012 R2 (KB 4471989) on 12/15.
Should I uninstall the .NET update or xfer the license. I have a two system license and I'd hate to have my other system loose it's license.