Hi. I'm David, and I'm happy to help you.
KB5067036 is a "Preview" update, essentially a beta version of the update scheduled for release next month. Preview updates are optional and may include experimental fixes or features. Because they haven't undergone full testing, they can sometimes be unstable or fail to install properly.
Importantly, you're not required to install preview updates, and skipping them won't expose your system to any security risks.
If KB5067036 continues to fail during installation, you can prevent Windows from attempting to install it by doing the following:
- Press "Windows + I" and select "Windows Update";
- Toggle off "Get the latest updates as soon as they're available";
- Restart your PC.
This will stop Windows from downloading optional updates like previews, and your system will only receive standard monthly updates going forward.
Since the other problems you mentioned may be caused by the system repeatedly trying to install this update, I suggest checking if the problems stop occurring after doing this. If any persist, please let me know.
Feel free to ask back any questions.