Security Monthly Quality Rollup updates have been failing for some time (over a year), all with the same 0x8024200d error code. The full text of the most recent of these failures:
I've also attempted to manually install using a download of this update from catalog.update.microsoft.com, which also failed to install the update. Event viewer reports:
SFC, SURT, and SFCFix all report no errors. Contents of CBS can be found at CBS.zip
Code:
Installation Failure: Windows failed to install the following update with error 0x8024200d: 2019-04 Security Monthly Quality Rollup for Windows Server 2008 R2 for x64-based Systems (KB4493472).
Code:
Windows update "Security Update for Windows (KB4493472)" could not be installed because of error 2147942402 "The system cannot find the file specified." (Command line: ""C:\Windows\system32\wusa.exe" "C:\Users\Administrator\Desktop\KB4493472\windows6.1-kb4493472-x64_8c89a0b8b74adf3630301e9ff4c071ff56644014.msu" ")