Appreciate it very much. Checksur clear of all the previous errors, but is now showing two missing deployment keys. I can however now view Roles and Features again, though pending updates still fail to install:
2019-09 Preview of Monthly Quality Rollup for Windows Server 2008 R2 for x64-based Systems (KB4516048) - Error details: Code 80092004
2019-09 Security Monthly Quality Rollup for Windows Server 2008 R2 for x64-based Systems (KB4516065) - Error details: Code 80092004
2020-01 Security and Quality Rollup for .NET Framework 3.5.1, 4.5.2, 4.6, 4.6.1, 4.6.2, 4.7, 4.7.1, 4.7.2, 4.8 for Windows 7 and Server 2008 R2 for x64 (KB4535102) - Error details: Code 80092004
Security Update for SQL Server 2014 Service Pack 3 GDR (KB4583463) - Error details: Code 800B0109