During Windows development, Microsoft tries to find every risk and vulnerability to security breaches that can cause problems or downtime such as external access, buffer overflows, blue screens, and system crashes. Even after the final version release, it is common to find these errors and bad functions in Windows. That's why Microsoft has a service named Windows Update, which provides update packages for all these problems that may arise in Hyper-V or any other component of Windows. It is also important to note that Microsoft has security teams that try to find security breaches before someone with bad intentions does. To make sure your servers are safe against all these threats, you need to make sure that they are up-to-date with all updates installed.
The Server Core installation is a good option to reduce the number of updates to be installed once only the core components are used, but this doesn't mean that you don't need to install updates for...