KB4551762 is released on March 12, 2020, which has been one year ago, we no longer need to install this KB now.
If your computer use Windows 10 1909, just install the latest update KB5001337. Because for Windows security update, the newer update will includes all contents of old updates.
https://support.microsoft.com/en-us/topic/april-13-2021-kb5001337-os-build-18363-1500-e7336837-2aaa-4f73-995c-ab2ba5013727
Prerequisite:
You must install the March 25, 2021 servicing stack update (SSU) (KB5001205) before installing the latest cumulative update (LCU). SSUs improve the reliability of the update process to mitigate potential issues while installing the LCU and applying Microsoft security fixes.
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