The following relevance revaluates to true after applying Fixlet 450699001 which is for KB4506990 (x64).
(not exists keys (names of values whose ((it >= “10.0.1.2819”) of (following text of last “~” of name of it as version)) of keys “Package_for_DotNetRollup~31bf3856ad364e35~amd64~~0.0.0.0” of key “HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\PackageIndex” of native registry) whose ((it = 96 OR it = 112) of (value “CurrentState” of it as integer)) of key “HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Component Based Servicing\Packages” of native registry)
When I install the update manually, it says this update is not applicable. I am not really sure where to look to see if it was installed. It is not in the usual places like Windows update, programs and features, or MBSA.