Windows updates from Microsoft are installed on the PVC Hardware Node; however, these updates are missing in some of the containers that are running on the Node.
During a container creation, PVC tools configures an exclusion from the set of updates available on the Node, based on the roles installed in the container. Updates from the exclusion list will not be installed inside the container. The exclusion list is not changed during the new roles installation (which happens, for example, during Parallels Plesk Panel installation) and related updates are not getting installed into the container.
Virtuozzo update according to 5865
: How to install system updates to a PVC Hardware Node.