(Update - 2/17 Editing for clarity based on feedback)
If you are currently experiencing the 0x80070bc2 error while attempting to install KB4074588, please try this:
- In the search box on the taskbar, type cmd.
- Right-click Command Prompt in the search results and select Run as administrator. (Select Yes, when prompted by the User Account Control.)
- In the Administrator: Command Prompt window, type the following command and press Enter:
SC config trustedinstaller start=auto 4. Restart the PC.
In some cases, a second restart may be required. If you look under Settings > Update & security and you see the message Status: Awaiting restart, restart the PC a second time to complete the installation.
Paul...