If you are comfortable with command line, you could try the following. I suggest making a restore point first:
- Click Start Menu and type CMD
- Right Click on Command Prompt to open it with Administrator Privileges
- In the Command Prompt, type the following:
wusa /uninstall /kb:5063878 /quiet /norestart
Translated: Windows Update will uninstall KB5063878, the Quiet flag suppresses prompts, the Norestart flag prevents automatic restart when it completes… but you would want to restart after this.
You should probably delay Windows Update for a while to prevent it from re-installing the update.