Microsoft has released an update that resolves a severe clustering regression in Windows Server 2019 introduced by July’s cumulative security rollup, closing a weeks‑long incident that left some failover clusters unstable and virtual machines repeatedly restarting. (support.microsoft.com)...
bitlocker
cluster service
cluster shared volumes
csv
enterprise it
event id 7031
failover clustering
it support
kb5062557
kb5063877
patch management
patch rollout
s2d
servicing stack update
ssu
windows server 2019
windows update
wsus
The July 2025 security update for Windows Server 2019, identified as KB5062557, has introduced significant challenges for IT administrators managing failover clusters. Post-installation, numerous organizations have reported critical issues, including cluster service failures and repeated virtual...
cluster quarantine
cluster service failures
cluster troubleshooting
event id 7031
failover clusters
high availability
it administration
kb5062557
microsoft support
security update
server management
server security
sysadmin challenges
virtual machine stability
virtualization issues
windows 2025 updates
windows server 2019
windows server security
windows server updates
windows update problems
Amid the relentless pace of change in IT infrastructure, organizations depend on a steady drumbeat of Windows Server security updates to shore up defenses and maintain stable operations. Yet, when a single cumulative update triggers widespread cluster and virtual machine instability on Windows...
backup and recovery
bitlocker csv issues
cluster failures
cluster service failures
enterprise it
high availability
it support challenges
kb5062557
microsoft support
patch regression
security patches
server outages
server security updates
support escalation
system recovery
update management
virtual machine instability
virtualization bugs
windows server
windows server 2019
Here’s a summary of the issues described in the BornCity blog post "WSUS has synchronization problems (July 9, 2025)":
What Happened?
Since July 9, 2025, administrators have reported that WSUS (Windows Server Update Services) is unable to synchronize with Microsoft’s update servers.
Attempts to...
it administrators
kb5062557
microsoft update
microsoft updates
network errors
network protocols
network troubleshooting
remote server connection
server connectivity
server outage
softwaredistribution.log
synchronization
system logs
troubleshooting
update failures
update services
windows server
windows server 2016
windows server 2025
wsus