After applying the update with KB ID: 4831, application-aware processing fails on all backups

[homerjs]

Case #08023462

Application-aware processing fails for all backup jobs on Windows Server 2025.
March 15, 2026 8:43:12 PM Failed: Failed to prepare guest for hot backup. Error: Cannot start service. Machine: [xxxx]. Service: [VeeamGuestHelper]. Cannot start service. Win32 error: The service did not respond in time to the start or control request. Code: 1053
Everything was still working in version 13.0.1.1071

[renatorichina]

This problem is already discussed in this thread: veeam-backup-replication-f2/veeam-13-is ... 02486.html