I have several Windows 10 PCs that are showing the "Windows Security Feature Bypass in Secure Boot (BootHole) vulnerability in Nessus scans. In researching the remediation for this vulnerability, it looks as if Microsoft included a fix in the January 2021 cumulative update. I have installed all updates (according to Windows check for updates), but this vulnerability is still showing up. I tried manually downloading and KB4535680 for Windows 10 ver. 1909 +, but when I try to install this update I get the "this update does not apply to your version of Windows" message. Any help in remediating this vulnerability would be greatly appreciated.